Download Manual - HP Archive

HP Archive
This vintage Hewlett Packard document was preserved
and distributed by
www. hparchive.com
Please visit us on the web !
Thanks to on-line curator: Fons Janssen
MODEL 6101A
DC POWER SUPPLY
HP Part Number 06101-90001
Series Prefixed 6L, 1A, 1E, 1137A and Above
(Including Optional Modifications Listed Below)
011, 028
Microfiche No. 06101-90002
OPERATING AND SERVICE MANUAL
HEWLETT
PACKARD
HARRISON
DIVISION
DC POWER SUPPLY
STB SERIES, MODEL 6101A
SERIAL NUMBER PREFIX 6L
Printed: December 2012
Stock Number: 06101-90001
TABLE OF CONTENTS
Section
Page No.
I GENERAL INFORMATION
1-1
1-1.
Description
1-1
1-6.
Specifications
1-1
1-8.
Options
1-1
1-10. Accessories
1-2
1-12. Instrument Identification
1-2
1-15. Ordering Additional Manuals 1-2
II
INSTALLATION
2-1.
Initial Inspection
2-3.
Mechanical Check
2-5.
Electrical Check
2-7.
Installation Data
2-9.
Location
2-11. Power Requirements
2-14. 230 Volt Operation
2-16. Power Cable
2-19. Rack Mounting
2-23. Repackaging for Shipment
Section
Page No.
IV PRINCIPLES OF OPERATION
4-1
4-1.
Overall Block Diagram
Discussion
4-1
4-6.
Simplified Schematic
4-2
4-9.
Detailed Circuit Analysis
4-3
4-10. Series Regulator
4-3
4-12. Constant Voltage Input Circuit 4-3
4-18. Driver and Error Amplifier
4-3
4-20. Current Limit Circuit
4-3
4-22. Oven Control Circuit
4-3
4-24. Reference Circuit
4-4
4-28. Meter Circuit
4-4
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-2
2-3
V
III OPERATING INSTRUCTIONS
3-1
3-1.
Operating Controls and
Indicators
3-1
3-3.
Operating Modes
3-1
3-5.
Normal Operating Mode
3-1
3-7.
Constant Voltage
3-1
3-9.
Current Limit
3-1
3-11. Connecting Load
3-2
3-14. Operation of Supply Beyond
Rated Output
3-2
3-16. Optional Operating Modes
3-2
3-17. Remote Programming, Constant
Voltage
3-2
3-24. Remote Resistance Programming,
Current Limit
3-3
3-27. Remote Sensing
3-3
3-32. Series Operation
3-4
3-36. Parallel Operation
3-5
3-38. Auto-Tracking Operation
3-5
3-42. Special Operating Considerations 3-5
3-43. Pulse Loading
3-5
3-45. Output Capacitance
3-6
3-48. Reverse Voltage Loading
3-6
3-50. Reverse Current Loading
3-6
3-52. Multiple Loads
3-6
MAINTENANCE
5-1.
Introduction
5-3.
General Measurement
Techniques
5-8.
Test Equipment Required
5-10. Performance Test
5-12. Rated Output and Meter
Accuracy
5-15. Load Regulation (Front
Terminals)
5-17. Line Regulation (Front
Terminals)
5-19. Ripple and Noise
5-21. Transient Recovery Time
5-23. Output Impedance
5-25. Current Limit
5-27. Troubleshooting
5-29. Trouble Analysis
5-37. Repair and Replacement
5-39. Adjustment and Calibration
5-41. Meter Zero
5-43. Voltmeter Tracking
5-45. Ammeter Tracking
5-47. Constant Voltage Programming
Current
VI REPLACEABLE PARTS
6-1.
Introduction
5-4.
Ordering information
Reference Designators
Abbreviations
Manufacturers
6-8.
Code List of Manufacturers
Parts List Table
i
5-1
5-1
5-1
5-1
5-3
5-3
5-4
5-4
5-4
5-5
5-5
5-6
5-6
5-6
5-8
5-11
5-11
5-11
5-12
5-12
5-12
6-1
6-1
6-1
6-2
6-5
TABLE OF CONTENTS (CONTINUED)
LIST OF TABLES
Table
1-1
5-1
5-2
5-3
Page No.
Specifications
1-3
Test Equipment Required
5-2
Reference Circuit Troubleshooting
5-6
High Output Voltage Troubleshooting
5-7
5-4 Low Output Voltage Troubleshooting 5-7
Table
Page No.
5-5 Common Troubles
5-8
5-6 Selected Semiconductor Characteristics
5-10
5-7 Checks and Adjustments After Replacement of Semiconductor Devices
5-10
5-8 Calibration Adjustment Summary
5-11
LIST OF ILLUSTRATIONS
Figure
Page No.
1-1 DC Power Supply
iv
2-1 Input Transformer Primary
Connections
2-1
2-2 Rack Mounting, Two Units
2-2
2-3 Rack Mounting, One Unit
2-2
3-1 Front Panel Controls and Indicators 3-1
3-2 Normal Strapping Pattern
3-1
3-3 Remote Resistance Programming
(Constant Voltage)
3-2
3-4 Remote .Voltage Programming
(Constant Voltage)
3-2
3-5 Remote Resistance Programming
(Current Limit)
3-3
3-6 Remote Sensing
3-3
3-7 Normal Series Connections
3-4
3-8 Auto-Series, Two and Three Units
3-4
3-9 Normal Parallel
3-5
Figure
3-10
4-1
4-2
4-3
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
ii
Page No.
Auto-Tracking, Two and Three Units 3-5
Overall Block Diagram
4-1
Simplified Schematic
4-2
Meter Circuit, Simplified Schematic 4-4
Front Panel Terminal Connections
5-1
Output Current Measurement
Technique
5-1
Differential Voltmeter Substitute,
Test Setup
5-3
Output Current, Test Setup
5-3
Load Regulation, Test Setup
5-4
Ripple and Noise, Test Setup
5-4
Transient Recovery Time Test Setup 5-5
Transient Recovery Time, Waveforms 5-5
Output Impedance, Test Setup
5-5
Servicing Printed Wiring Boards
5-9
Figure 1-1. Typical STB Power Supply
iii
SECTION 1
GENERAL INFORMATION
1-1
DESCRIPTION
of operation or when greater voltage compliance is
required in the constant current mode of operation.
Auto-Series operation permits one knob control of the
total output voltage from a "master" supply.
1-2 The STB Series of power supplies is designed for
applications requiring extreme stability, regulation, and
insensitivity to ambient temperature variations. The
supply is completely transistorized (all-silicon) and is
suitable for either bench or relay rack operation. The
accurate programming coefficient allows the supply to
be used as a 0.1% calibrator, or as a voltage reference
source. It is a Constant Voltage / Current Limiting
supply that will furnish full rated output voltage at the
maximum rated output current or can be continuously
adjusted throughout the output range. The front panel
CURRENT controls can be used to establish the output
current limit (overload or short circuit) when the
supply is used as a constant voltage source and the
VOLTAGE controls can be used to establish the voltage limit (ceiling) when the supply is used as a
constant current source.
d.
The power supply may be operated in
parallel with a similar unit when greater output current
capability is required.
e.
1-6 SPECIFICATIONS
1-7 Detailed Specifications for the power supply are
given in Table 1-1.
1-8 OPTIONS
1-9 Options are factory modifications of a standard
instrument that are requested by the customer. A
typical option is replacing the front panel voltage and
current controls with ten-turn voltage and current
decadial controls. The following options are available
on the instrument covered by this manual. Where
applicable, detailed coverage of options is included
throughout the manual.
1-4 A single meter is used to measure either output
voltage or output current in one of two ranges. The
voltage or current ranges are selected by a METER
switch on the front panel.
1-5 The programming terminals located at the rear of
the unit allow ease in adapting to the many operational
capabilities of the power supply. A brief description of
these capabilities is given below:
Option No. Description
06
Remote Programming
The power supply may be programmed
from a remote Location by means of an external
voltage source or resistance.
b.
Remote Sensing
The degradation in regulation which would
occur at the load because of the voltage drop in the
load leads can be reduced by using the power supply in
the remote sensing mode of operation.
c.
Auto-Tracking
The power supply may be used as a
"master" supply, having control over one (or more)
"slave" supplies that furnish various voltages for a
system.
1-3 The power supply has both front and rear
terminals. Either the positive or negative output
terminal may be grounded or the power supply can be
operated floating at up to a maximum of 300 volts off
ground.
a.
Parallel Operation
Series and Auto Series Operation
Power Supplies may be used in series when
a higher output voltage is required in the voltage mode
1-1
Overvoltage Protection "Crowbar": A
completely separate circuit for protecting
delicate loads against power supply
failure or operator error. This independent
device monitors the output voltage and
within 10µsec impose a virtual shortcircuit (crowbar) across the power supply
output if the preset overvoltage margin is
exceeded. When Option 06 is requested
by the customer, Model 6916A is
attached to the rear of the power supply at
the factory.
Overvoltage Margin: 1 to 4 volts,
screwdriver adjustable.
Power Requirement: 15mA continuous
drain from power supply being protected.
Part No.
Size: Add 5 inches to power supply
depth dimension.
Weight: Add 2 lbs. net.
14523A
Rack Kit for mounting two 3½”-high
supplies (Refer to Section II for
details).
14525A
Rack Kit for mounting two 5¼”-high
supplies (Refer to Section II for
details).
NOTE
Detailed coverage of Option 06 is included in an
addendum entitled, Model 6916A Overvoltage
Protector. The addendum is included at the rear of
manuals that support power supplies that have been
modified for Option 06.
28
1-12 INSTRUMENT IDENTIFICATION
1-13 Hewlett-Packard power supplies are identified by
a three-part serial number tag. The first part is the
power supply model number. The second part is the
serial number prefix, which consists of a number-letter
combination that denotes the date of a significant
design change. The number designates the year, and
the letter A through L designates the month, January
through December respectively. The third part is the
power supply serial number.
Rewire for 230V Input: Supply as
normally shipped is wired for 115VAC
input. Option 28 consists of reconnecting
the input transformer for 230VAC
operation.
1-10 ACCESSORIES
1-11 The accessories listed in the following may be
ordered with the power supply or separately from the
local Hewlett-Packard field sales office (refer to list at
rear of manual for addresses).
Part No.
C05
Description
1-14 If the serial number prefix on your power supply
does not agree with the prefix on the title page of this
manual, change sheets are included to update the
manual. Where applicable, backdating information is
given in an appendix at the rear of the manual.
Description
1-15 ORDERING ADDITIONAL MANUALS
8” Black Handle that can be attached
to side of supply.
14513A
Rack Kit for mounting one 3½”-high
supply (Refer to Section II for details).
14515A
Rack Kit for mounting one 5¼”-high
supply (Refer to Section II for details).
1-16 One manual is shipped with each power supply.
Additional manuals may be purchased from your local
Hewlett-Packard field office (see list at rear of this
manual for addresses). Specify the model number,
serial number prefix, and
Stock Number provided
on the title page.
1-2
Table 1-1. Specifications
INPUT:
105-125/210-250VAC, single phase, 48-63Hz
(cps), 0.5A, 52W.
tects the power supply for all overloads including a
direct short placed across the output terminals.
METER:
Front panel meter and switch select 0-2.5V/
0-25V and 0-120mA/0-1.2A scales.
OUTPUT:
0-20 volts at 0-1 ampere.
LOAD REGULATION:
Front terminals: Less than 0.001% plus 600µV.
Rear terminals: Less than 0.001% plus 100µV.
For an output current change from no load to
full load.
OUTPUT CONTROLS:
A ten-turn coarse and one-turn fine voltage
control enable high resolution voltage adjustment.
A single turn front panel pot permits the current
limit setting to be varied continuously from zero to
a value slightly in excess of the full current rating.
LINE REGULATION:
Less than 0.001% output change for any line
voltage change within the input rating.
OUTPUT TERMINALS:
Three "five-way" output posts are provided on
the front panel and an output barrier strip is located
on the rear of the chassis. All power supply output
terminals are isolated from the chassis and either
the positive or negative terminal may be connected
to the chassis through a separate ground terminal
located on the output terminal strip.
RIPPLE AND NOISE:
At any line voltage and under any load condition
within rating.
Less than 100µV peak-to-peak.
Less than 40µV rms.
TEMPERATURE COEFFICIENT:
After 30 minutes warm-up
Front panel control: Less than 0.005% plus
30µV per degree Centigrade.
Remote programming: Less than 0.001% plus
10µV per degree Centigrade.
ERROR SENSING:
Error sensing is automatically accomplished at
the front terminals if the load is attached to the
front terminals or at the rear terminals if the load is
attached to the rear terminals. Provision is also
included on the rear terminal strip for remote error
sensing.
STABILITY:
Total drift after 30 minutes warm-up and with less
than ±3°C ambient temperature variation.
Front panel control: Less than 0.01% plus
300µV for 8 hours.
Remote programming: Less than 0.01% plus
100µV for 8 hours.
Less than 0.012% + 120µV for one month.
REMOTE PROGRAMMING:
Remote programming of the output voltage is
made available at the rear terminals. The
programming coefficient is 1000 ohms per volt
with an accuracy of 0.1% plus 1 millivolt. The
current limit may also be set remotely by means of
a resistance, 1000 ohms corresponding
approximately to full output current.
TEMPERATURE RANGES:
Operating: 0 to 50°C. Storage: -20 to +85°C.
COOLING:
Convection cooling is employed. The supply
has no moving parts.
OUTPUT IMPEDANCE:
Less than 0.002 ohms from DC to 100 Hz.
Less than 0.02 ohms from 100 Hz to 1 kHz.
Less than 0.5 ohms from 1 kHz to 100 kHz.
Less than 3 ohms from 100 kHz to 1 MHz.
SIZE:
3-½" H x 8-½" W x 12-⅝" D. Two units can
be mounted side by side to take up the same space
as a standard 3-½" x 19" relay rack mounting.
TRANSIENT RECOVERY TIME:
Less than 50 microseconds for output recovery to
within 10 millivolts of the nominal output voltage
following a full load current change. Less than 100
microseconds for output recovery to within load
regulation specification.
WEIGHT: 10 lbs. net, 13 lbs. shipping.
FINISH: Light gray front panel with dark gray case.
POWER CORD:
A 3-wire, 5-foot power cord is provided with
each unit.
OVERLOAD PROTECTION:
A continuously variable current limit circuit pro-
1-3
SECTION II
INSTALLATION
2-1 INITIAL INSPECTION
a 115 volt source. To convert the power supply for
operation from a 230 volt source, the power
transformer windings must be connected in series. The
windings are connected in series as follows: (Refer to
Figure 2-1).
2-2 Before shipment, this instrument was inspected
and found to be free of mechanical and electrical
defects. As soon as the instrument is unpacked,
inspect for any damage that may have occurred in
transit. Save all packing materials until the inspection
is completed. If damage is found, proceed as described
in the Claim for Damage in Shipment section of the
Warranty at the rear of this manual.
45
45
46
46
S1
2-3 MECHANICAL CHECK
S1
47
2-4 This check confirms that there are no broken
knobs or connectors, that the cabinet and panel
surfaces are free of dents and scratches, and that the
meters are not scratched or cracked.
FUSE
/115V
/230V
48
2-5 ELECTRICAL CHECK
TRANSFORMER PRIMARY
CONNECTED FOR
115 VOLT OPERATION
2-6 The instrument should be checked against its
electrical specifications. Section V includes an "incabinet" performance check to verify proper
instrument operation.
47
FUSE
48
TRANSFORMER PRIMARY
CONNECTED FOR
230 VOLT OPERATION
Figure 2-1. Input Transformer Primary Connections
a. Unplug the line cord and remove the top and
bottom covers from the case. (This is done by
removing the four screws which hold each cover to the
side frames.)
b. With a sharp knife or razor blade, cut the
printed wiring between test points 45 and 46 and also
between 47 and 48 on the printed circuit board. These
are shown on the overall schematic and are labeled on
the printed circuit board.
c. Connect a jumper wire between 46 and 47.
d. Replace the fuse with a 1 ampere 230 volt
fuse. Replace covers and operate unit normally.
2-7 INSTALLATION DATE
2-8 The instrument is shipped ready for bench
operation. It is only necessary to connect the instrument to a source of power and it is ready for
operation.
2-9 LOCATION
2-10 This instrument is air cooled. Sufficient space
should be provided around the instrument to permit
free flow of cooling air along the sides and to the rear.
It should be used in an area where the ambient
temperature does not exceed 50°C (122°F).
2-16 POWER CABLE
2-11 POWER REQUIREMENTS
2-17 To protect operating personnel, the National
Electrical Manufacturers Association (NEMA)
recommends that the instrument panel and cabinet be
grounded. This instrument is equipped with a three
conductor power cable. The third conductor is the
ground conductor and when the cable is plugged into
an appropriate receptacle, the instrument is grounded.
The offset pin on the power cable three prong
connector is the ground connection.
2-12 This power supply may be operated from either a
115 or 230 volt. 48-63 cps power source. The unit, as
shipped from the factory, is wired for 115V operation.
2-13 The input power required when operating at full
load from a 115 volt, 60 cycle power source is 45
watts and 0.5 amperes.
2-14 230 VOLT OPERATION
2-18 To preserve the protection feature when operating
the instrument from a two-contact outlet, use a threeprong to two-prong adaptor and connect the green lead
on the adaptor to ground.
2-15 Normally, the windings of the input transformer are connected in parallel for operation from
2-1
HARRISON
DC POWER SUPPLY
HEWLETT-PACKARD
HARRISON
DC POWER SUPPLY
HEWLETT-PACKARD
VOLTAGE
METER
5V
50V 0.6A
CURRENT
0.06A
COARSE
METER
FINE
5V
50V 0.6A
CURRENT
0.06A
VOLTAGE
COARSE
FINE
Figure 2-2. Rack Mounting, Two Units
2-19 RACK MOUNTING
d. After fastening rear portions of units together
using the bolt, nut, and spacer, replace panel screws.
2-2 This instrument may be rack mounted in a standard
19 inch rack panel either alongside a similar unit or by
itself. Figures 2-2 and 2-3 show how both types of
installations are accomplished.
2-22 To mount a single unit in the rack panel, proceed as
follows:
a. Bolt rack mounting ears, combining straps,
and angle brackets to each side of center spacing panels.
Angle brackets are placed behind combining straps as
shown in Figure 2-3.
b. Remove four screws from front panel of unit.
c. Slide combining strips between front
panel and case of unit.
d. Bolt angle brackets to front sides of case and
replace front panel screws.
2-21 To mount two units side-by-side, proceed as
follows:
a. Remove the four screws from the front
panels of both units.
b. Slide rack mounting ears between the
front panel and case of each unit.
c. Slide combining strip between the front
panels and cases of the two units.
HARRISON
DC POWER SUPPLY
HEWLETT-PACKARD
METE
50VR
5V
0.6
CURRENT
A 0.06
A
VOLTAGE
COARSE
FINE
Figure 2-3. Rack Mounting, One Unit
2-2
2-23 REPACKAGING FOR SHIPMENT
obtain the materials. This office will also furnish the
address of the nearest service office to which the
instrument can be shipped. Be sure to attach a tag to
the instrument which specifies the owner, model
number, full serial number, and service required, or a
brief description of the trouble.
2-24 To insure safe shipment of the instrument, it is
recommended that the package designed for the
instrument be used. The original packaging material is
reusable. If it is not available, contact your local
Hewlett-Packard field office to
2-3
SECTION III
OPERATING INSTRUCTIONS
3-1 OPERATING, CONTROLS AND INDICATORS
3-5 NORMAL OPERATING MODE
3-2 The front panel controls and indicators, together with the normal turn-on sequence, are shown in
Figure 3.1.
3-6 The power supply is normally shipped with its
rear terminal strapping connections arranged for
Constant Voltage / Current Limiting, local sensing,
local programming, single unit mode of operation. This
strapping pattern is illustrated in Figure 3-2. The
operator selects either a constant voltage or current
limited output using the front panel controls (local
programming, no strapping changes are necessary).
1 PILOT LIGHT
HARRISON
DC POWER SUPPLY
HEWLETT-PACKARD
10
VOLTS
20 30
40
0
50
A1
.2 .3 .4
0 .1 AMPERES.5 .6
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
VOLTAGE
METER
5V
A2
50V 0.6A
CURRENT
0.06A
COARSE
FINE
LOAD
MONITORING
POINT
2
CURRENT LIMIT
CONTROL
5
Figure 3-2. Normal Strapping Pattern
FINE OUTPUT
VOLTAGE CONTROL
METER SWITCH
3
OUTPUT TERMINALS
3-7 CONSTANT VOLTAGE
COARSE OUTPUT
VOLTAGE CONTROL
4
3-8 To select a constant voltage output, proceed as
follows:
a. Turn-on power supply and adjust
VOLTAGE controls for desired output voltage (output
terminals open).
b. Short output terminals and adjust CURRENT controls for maximum output current allowable
(current limit), as determined by load conditions. If a
load change causes the current limit to be exceeded, the
power supply will automatically crossover to constant
current output at the preset current limit and the output
voltage will drop proportionately. In setting the current
limit, allowance must be made for high peak current
which can cause unwanted crossover. (Refer to
Paragraph 3-43.)
TURN-ON SEQUENCE
1.
2.
3.
4.
5.
6.
7.
PUSH LINE SWITCH TO TURN ON SUPPLY AND
OBSERVE THAT LIGHT GOES ON.
SET METER SWITCH TO DESIRED VOLTAGE RANGE.
ADJUST COARSE AND FINE VOLTAGE CONTROLS UNTIL
DESIRED OUTPUT VOLTAGE IS INDICATED ON METER.
SHORT CIRCUIT OUTPUT TERMINALS AND SET METER
SWITCH TO DESIRED CURRENT RANGE.
ADJUST CURRENT CONTROL FOR DESIRED OUTPUT
CURRENT.
REMOVE SHORT AND CONNECT LOAD TO OUTPUT
TERMINALS (FRONT OR REAR).
POWER IS REMOVED BY PUSHING THE LINE SWITCH.
Figure 3-1. Front Panel Controls and Indicators
3-3 OPERATING MODES
3-4 The power supply is designed so that its mode of
operation can be selected by making strapping
connections between particular terminals on the
terminal strip at the rear of the power supply. The
terminal designations are stenciled in white on the
power supply above their respective terminals. Althrough the strapping patterns illustrated in this section
show the negative terminal grounded, the operator can
ground either terminal or operate the power supply up
to 300 vdc off ground (floating). The following
paragraphs describe the procedures for utilizing the
various operational capabilities of the power supply. A
more theoretical description is contained in a power
supply Application Manual and in various Tech.
Letters published by the Harrison Division. Copies of
these can be obtained from your local Hewlett-Packard
field office.
3-9 CURRENT LIMIT
3-10 To select a current limit output, proceed as
follows:
a. Short output terminals and adjust CURRENT controls for desired output current.
b. Open output terminals and adjust VOLTAGE controls for maximum output voltage allowable
(voltage limit), as determined by load conditions. If a
load change causes the voltage limit to be exceeded,
the power supply will automatically crossover to
constant voltage output at the preset voltage limit and
the output current will drop proportionately. In setting
the voltage limit, allowance must be made for high
peak voltages which can cause unwanted crossover.
(Refer to Paragraph 3-43.)
3-1
3-11 CONNECTING LOAD
A1
3-12 Each load should be connected to the power
supply output terminals using separate pairs of
connecting wires. This will minimize mutual coupling
effects between loads and will retain full advantage of
the low output impedance of the power supply. Each
pair of connecting wires should be as short as possible
and twisted or shielded to reduce noise pickup. (If
shield is used, connect one end to power supply ground
terminal and leave the other end unconnected.)
A2
A3
A4
A5
A6
A7
+S
+
LOAD MAY BE TAKEN
FROM FRONT OR REAR
TERMINALS AS DESIRED
G
–
–S
A8
A9 A10
LOAD
PROGRAMMING
RESISTOR
(1000 OHMS PER VOLT)
3-13 If load considerations require that the output
power distribution terminals be remotely located from
the power supply, then the power supply output
terminals should be connected to the remote
distribution terminals via a pair of twisted or shielded
wires and each load separately connected to the remote
distribution terminals. For this case, remote sensing
should be used (Paragraph 3-27).
Figure 3-3. Remote Resistance Programming
(Constant Voltage)
3-20 The output voltage of the power supply should be
zero volts ±1 millivolt when zero ohms is connected
across the programming terminals. If a zero ohm
voltage closer than this is required, it may be achieved
by changing resistor R14 as described in Paragraph 548.
3-14 OPERATION OF SUPPLY BEYOND RATED OUTPUT
3-15 The shaded area on the front panel meter face
indicates the amount of output voltage or current that is
available in excess of the normal rated output.
Although the supply can be operated in this shaded
region without being damaged, it cannot be guaranteed
to meet all of its performance specifications. However,
if the line voltage is maintained above 115 Vac, the
supply will probably operate within its specifications.
3-21 To maintain the stability and temperature coefficient of the power supply, use programming
resistors that have stable, low noise, and low
temperature characteristics (less than 5 ppm per degree
Centigrade). A switch can be used in conjunction with
various resistance values in order to obtain discrete
output voltages. The switch should have make-beforebreak contacts to avoid momentarily opening the
programming terminals during the switching interval.
3-16 OPTIONAL OPERATING MODES
3-17 REMOTE PROGRAMMING, CONSTANT VOLTAGE
3-22 Voltage Programming (Figure 3-4). Employ the
strapping pattern shown on Figure 3-4 for voltage
programming. In this mode, the output voltage will
vary in a 1 to 1 ratio with the programming voltage
(reference voltage) and the load on the programming
voltage source will not exceed 0.5 microampere.
3-18 The constant voltage output of the power supply
can be programmed (controlled) from a remote location
if required. Either a resistance or voltage source can be
used for the programming device. The wires
connecting the programming terminals of the supply to
the remote programming device should be twisted or
shielded to reduce noise pick-up. The VOLTAGE
controls on the front panel are disabled according to the
following procedures.
A1
3-19 Resistance Programming (Figure 3-3). In this
mode, the output voltage will vary at a rate determined
by the programming coefficient--1000 ohms per volt
(i.e. the output voltage will increase 1 volt for each
1000 ohms added in series with programming
terminals). The programming coefficient is determined
by the programming current. This current is adjusted to
within 0.1% of l mA at the factory. If greater
programming accuracy is required, it may be achieved
by changing resistor R16.
A2
A3
A4
A5
A6
+S
+
G
–
–S
A8
A9 A10
LOAD
RX
(<6K)
REFERENCE
VOLTAGE
A7
+
Figure 3-4. Remote Voltage Programming
(Constant Voltage)
3-2
3-27 REMOTE SENSING (See Figure 3-6)
3-23 The impedance (RX) looking into the external
programming voltage source should be approximately
6000 ohms if the temperature and stability specifications of the power supply are to be maintained.
3-26 Remote sensing is used to maintain good
regulation at the load and reduce the degradation of
regulation which would occur due to the voltage drop
in the leads between the power supply and the load.
Remote sensing is accomplished by utilizing the
strapping pattern shown in Figure 3-6. The power
supply should be turned off before changing strapping
patterns. The leads from the +S terminals to the load
will carry approximately 1 milliampere of current, and
it is not required that these leads be as heavy as the
load leads. However, they must be twisted or shielded
to minimize noise pick-up.
3-24 REMOTE RESISTANCE PROGRAMMING,
CURRENT LIMIT (See Figure 3-5)
3-25 The output current will vary roughly in proportion to the programming resistor. Full current output is
obtained with approximately 1000 ohms; however, the
exact current setting should be checked by shorting the
output terminals and reading the current with the
programming resistor in place.
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A1
A9 A10
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
LOAD
LOAD
PROGRAMMING
RESISTOR
(≈1K FOR FULL LOAD)
NOTE:
IF TRANSIENT RESPONSE IS POOR
OR POWER SUPPLY OSCILLATES
REMOVE JUMPER FROM A7 TO (+)
AND ADD CAPACITOR CX AT LOAD
Figure 3-5. Remote Resistance Programming
(Current Limit)
CX (200µF 150V)
Figure 3-6. Remote Sensing
3-26 Use stable, low noise, low temperature coefficient
(less than 5 ppm/°C) programming resistors to maintain
the power supply temperature coefficient and stability
specifications. A switch may be used to set discrete
values of output current. A make-before-break type of
switch should be used since the output current will
exceed the maximum rating of the power supply if the
switch contacts open during the switching interval.
CAUTION
Observe polarity when connecting the
sensing leads to the load.
3-29 Note that it is desirable to minimize the drop in
the load leads and it is recommended that the drop not
exceed 1 volt per lead if the power supply is to meet its
DC specifications. If a larger drop must be tolerated,
please consult a Hewlett-Packard field representative.
3-30 The procedure just described will result in a low
DC output impedance at the load. If a low AC
impedance is required, it is recommended that the
following precautions be taken:
a. Disconnect output capacitor C3, by
disconnecting the strap between A7 and (+).
CAUTION
If the programming terminals (Al and A9)
should open at any time during this mode, the
output current will rise to a value that may
damage the power supply and/or the load. To
avoid this possibility, connect a 1KΩ resistor
across the programming terminals and in
parallel with a remote programming resistor.
Like the programming resistor, the 1KΩ
resistor should be of the low noise, low
temperature coefficient type.
3-3
3-34 Auto-Series Connections (Figure 3-8). The AutoSeries configuration is used when it is desirable to
have the output voltage of each of the series connected
supplies vary in accordance with the setting of a
control unit. The control unit is called the master; the
controlled units are called slaves. At maximum output
voltage, the voltage of the slaves is determined by the
setting of the front panel VOLTAGE control on the
master. The master supply must be the most positive
supply of the series. The output CURRENT controls
of all series units are operative and the current limit is
equal to the lowest control setting. If any output
CURRENT controls are set too low, automatic
crossover to constant current operation will occur and
the output voltage will drop. Remote sensing and
programming can be used; however, the strapping
arrangements shown in the applicable figures show
local sensing and programming.
b. Connect a capacitor having similar characteristics (approximately same capacitance, same
voltage rating or greater, and having good high frequency characteristics) across the load using short
leads.
3-31 Although the strapping patterns shown in Figures
3-3 through 3-5 employ local sensing, note that it is
possible to operate a power supply simultaneously in
the remote sensing end Constant Voltage/Current Limit
remote programming modes.
NOTE
It is necessary to re-adjust the current
limit when the instrument is operated in
the remote sensing mode.
3-32 SERIES OPERATION
A1
3-33 Normal Series Connections (Figure 3-7). Two or
more power supplies can be operated in series to obtain
a higher voltage than that available from a single
supply. When this connection is used, the output
voltage is the sum of the voltages of the individual
supplies. Each of the individual supplies must be
adjusted in order to obtain the total output voltage. The
power supply contains a protective diode connected
internally across the output which protects the supply if
one power supply is turned off while its series
partner(s) is on.
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
RX
RX
LOAD
RX
A9 A10
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
LOAD
RX
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
Figure 3-8. Auto-Series, Two and Three Units
3-35 In order to maintain the temperature coefficient
and stability specifications of the power supply, the
external resistors (Rx) shown in Figure 3-8 should be
stable, low noise, low temperature coefficient (less than
5 ppm per degree Centigrade) resistors. The value of
each resistor is dependant on the desired output voltage
ratings of the master and slave supplies. The value of
Rx is this voltage divided by the voltage programming
current of the supply, 1mA (1/KP where KP is the
voltage programming coefficient).
MASTER
RX
LOAD
SLAVE
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
RX
Figure 3-7. Normal Series
3-4
A1
3-36 PARALLEL OPERATION (Figure 3-9).
A2
A3
A4
A5
A6
A7
+S
+
–
G
–S
A8
A9 A10
MASTER*
3-37 Two or more power supplies can be connected in
parallel to obtain a total output current greater than that
available from one power supply. The total output
current is the sum of the output currents of the
individual power supplies. The output CURRENT
controls of each power supply can be separately set.
The output voltage controls of one power supply
should be set to the desired output voltage; the other
power supply should be set for a slightly larger output
voltage. The supply set to the lower output voltage will
act as a constant voltage source; the supply set to the
higher output will act as a constant current source,
dropping its output voltage until it equals that of the
other supply.
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
LOAD #1
RA
* MASTER MUST BE
POSITIVE SUPPLY
SLAVE MAY BE
EITHER POLARITY
A1
A8
A2
A3
A4
LOAD #2
RB
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
A9 A10
LOAD
LOAD #1
RA
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
Figure 3-9. Normal Parallel
RB
LOAD #2
RC
3-38 AUTO TRACKING OPERATION (See Figure 3-10.)
3-39 This connection is used when it is necessary to
provide several voltages, all referred to a common
bus, which vary in proportion to the setting of one
master instrument. The following constraints must be
observed when using this connection.
a. The master unit must be a positive voltage
source. When several positive sources are used, the
master must be the largest voltage unit.
b. The external resistors should be stable, low
noise, low temperature coefficient resistors if the
instruments are to maintain their temperature coefficient and stability specifications.
A1
A2
A3
A4
A5
A6
A7
+S
+
G
–
–S
A8
A9 A10
LOAD #3
RD
Figure 3-10. Auto-Tracking. Two and Three Units
3-42 SPECIAL OPERATING CONSIDERATIONS
3-40 The resistor values are determined as follows:
Referring to Figure 3-10 for two units.
3-43 PULSE LOADING
3-44 The power supply wilt automatically crossover
from constant voltage to constant current operation, or
the reverse, in response to an increase (over the preset
limit) in the output current or voltage, respectively.
Although the preset limit may be set higher than the
average output current or voltage, high peak currents or
voltages (as occur in pulse loading) may exceed the
preset limit and cause crossover to occur. If this
crossover limiting is not desired, set the preset limit for
the peak requirement and not the average.
𝑅𝐴 𝑉 𝑀𝑎𝑠𝑡𝑒𝑟 − 𝑉 𝑆𝑙𝑎𝑣𝑒
=
𝑅𝐵
𝑉 𝑆𝑙𝑎𝑣𝑒
Choosing 10 milliamperes as a reasonable maximum
current in the resistors RA= 100(V master – V slave)
and RB = 100 (V slave).
3-41. For several units connected in auto tracking
refer to Figure 3-10. RA and RB are determined as
before. RC = 100 (V master – V slave2), RD 100 (V
slave2), etc.
3-5
3-45 OUTPUT CAPACITANCE
voltage is applied to the output terminals (positive voltage
applied to negative terminal), the diode will conduct,
shunting current across the output terminals and limiting the
voltage to the forward voltage drop of the diode. This diode
protects the series transistors and the output electrolytic
capacitors.
3-46 There is a capacitor (internal) across the output
terminals of the power supply. This capacitor helps to
supply high-current pulses of short duration during constant
voltage operation. Any capacitance added externally will
improve the pulse current capability, but will decrease the
safety provided by the constant current circuit. A highcurrent pulse may damage load components before the
average output current is large enough to cause the constant
current circuit to operate.
3-50 REVERSE CURRENT LOADING
3-51 Active loads connected to the power supply may
actually deliver a reverse current to the power supply during
a portion of it's operating cycle. An external source cannot
be allowed to pump current into the supply without loss of
regulation and possible damage to the output capacitor. To
avoid these effects, it is necessary to preload the supply with
a dummy load resistor so that the power supply delivers
current through the entire operating cycle of the load device.
3-47 The effects of the output capacitor during constant
current operation are as follows:
a. The output impedance of the power supply
decreases with increasing frequency.
b. The recovery time of the output voltage is longer
for load resistance changes.
c. A large surge current causing a high power
dissipation in the load occurs when the load resistance is
reduced rapidly.
3-52 MULTIPLE LOADS
3-53 It is imperative that each load taken from the power
supply have two separate leads brought back to the power
supply output terminals if full advantage is to be taken of
the low output impedance of the power supply and if mutual
coupling effects between loads are to be avoided.
3-48 REVERSE VOLTAGE LOADING
3-49 A diode is connected across the output terminals.
Under normal operating conditions, the diode is reverse
biased (anode connected to negative terminal). If a reverse
3-6
SECTION IV
PRINCIPLES OF OPERATION
AC
INPUT
POWER
TRANSFORMER
BIAS
SUPPLY
RECTIFIER
AND
FILTER
OVEN
CONTROL
CIRCUIT
BIAS
VOLTAGES
REFERENCE
CURRENT
LIMITING
CIRCUIT
BIAS
VOLTAGE
+
SERIES
REGULATOR
CURRENT
SAMPLING
RESISTOR
CONSTANT
VOLTAGE
INPUT
CIRCUIT
NOTE:
DENOTES VOLTAGE
FEEDBACK PATH
DENOTES CURRENT
LIMIT PATH
+
M
METER
CIRCUIT
-
-
Figure 4-1. Overall Block Diagram
4-1 OVERALL BLOCK DIAGRAM DISCUSSION
4-2 The power supply, Figure 4-1, consists of a power
transformer, rectifier and filter, series regulator, error
amplifier and driver, constant voltage input circuit,
current limiting circuit, reference regulator circuit, bias
supply, meter circuit, and an oven control circuit.
4-3 The ac input line voltage is reduced to the proper
level and coupled to the rectifier and filter. The rectifierfilter converts the ac input to raw dc which is fed to the
positive terminal via the regulator and current sampling
resistor network. The regulator, part of the feedback
loop, is made to alter it's conduction to maintain a
constant output voltage or limit the output current. The
voltage developed across the current sampling resistor
network is the input to the current limiting circuit. If the
output current that passes through the sampling network
exceeds a certain predetermined level, the current
limiting circuit applies a feedback signal to the series
regulator which alters the regulator's conduction so that
the output current does not exceed the predetermined
current limit.
4-1
4-4 The constant voltage input circuit obtains it's input
by sampling the output voltage of the supply. Any
changes in output voltage are detected in the constant
voltage input circuit, amplified by the error amplifier
and driver, and applied to the series regulator in the
correct phase and amplitude to counteract the change in
output voltage. The reference regulator circuit provides
stable reference voltages which are used by the constant
voltage input circuit and the current limiting circuit for
comparison purposes. The bias supply furnishes
voltages which are used throughout the instrument for
biasing purposes. The meter circuit provides indications
of output voltage or current in either operating mode.
4-5 An oven houses the temperature sensitive
components in the supply to provide a low temperature
coefficient which results in excellent stability. The
oven control circuit maintains the oven temperature at
65°C.
6 CR24
7
+6.2V
8 CR25
+
+S
REFERENCE
REGULATOR
Q12-Q15
C25 30V
-9.4V
+12.4V
+
4
M
-
CURRENT
LIMITING
CIRCUIT
Q5
3
2
115V
11 CR27
-
R55
DS1
S1
ON/OFF
SWITCH
+
10
9
F1
1
+OUT
-OUT
METER
CIRCUIT
S2
C17
OVEN
CONTROL
CIRCUIT
Q16
20V
A10
A9
2.5V
CR29
R23
CURRENT
SAMPLING
RESISTOR
SERIES
REGULATOR
Q11
13
14
CURRENT
CONTROL
R25
CR13
CR26
12
-9.4V
CR30
R54
C19
+O
+6.2V
CONSTANT
VOLTAGE
PULLOUT
FINE
RESISTOR
VOLTAGE
-9.4V
ADJ.
R11
+12.4V
VOLTAGE
INPUT
CIRCUIT
Q1,Q3
+
-
NOTE 1
DRIVER
Q10
ERROR
AMPL.
Q7,Q8,Q9
COARSE
VOLTAGE
ADJ.
C4 +
R20
+S
A7
A2
A3
A5
A6
CR32
C23
A8
-S
-O
NOTE 1: MAIN SUPPLY OUTPUT
VOLTAGES ARE:
MODEL
VDC
6101A
25
6102A
60
6106A
132
6111A
25
6112A
60
6113A
13
6116A
132
Figure 4-2. Simplified Schematic
4-6 SIMPLIFIED SCHEMATIC
4-8 Diode CR32, connected across the output terminals
of the power supply, is a protective device which
prevents internal damage that might occur if a reverse
voltage were applied across the output terminals. Output
capacitor, C23, is also connected across the output
terminals when the normal strapping pattern shown on
Figure 4-2 is employed. Note that this capacitor can
be removed if an increase in the programming speed is
desired.
4-7 A simplified schematic of the power supply is
shown in Figure 4-2. It illustrates the operating
controls; the ON-off switch, and the voltage
programming controls (R11 and R20). Figure 4-2 also
shows the internal sources of bias and reference
voltages and their nominal magnitudes with an
input of 115 Vac.
4-2
A variable current injected at the junction of the
programming and pullout resistors through R15 allows
fine trimming of the programming current.
4-9 DETAILED CIRCUIT ANALYSIS
(Refer to Overall Schematic at Rear of Manual.)
4-10 SERIES REGULATOR
4-11 The series regulator consists of transistor stage
Q11. The regulator serves as a series control element by
altering it’s conduction so that the output voltage and
the current limit is never exceeded. The conduction of
Q11 is controlled by the feedback voltage obtained from
driver Q10.
4-12 CONSTANT VOLTAGE INPUT CIRCUIT
4-13 This circuit consists of the programming resistors,
coarse voltage adjustment R20, fine voltage adjustment
R11, and differential amplifiers Ql, Q2-Q3, and Q7-Q8.
Ql consists of two transistors having closely matched
characteristics in a single transistor package. This
package insures that both transistors will operate at
essentially the same temperature, minimizing drift due
to thermal differentials. Ql, Q2, and Q3 are enclosed in a
constant-temperature oven to further minimize the
effects of changing ambient temperature.
4-16 The base of Q1B is connected to ground through
R2. Variable currents can be injected at this point
through R13 which serves to compensate for fixed
voltage offsets in Ql, and through R11 which is the
fine voltage adjustment.
4-17 Negative feedback is coupled from the output of
differential amplifier Q7-Q8 to the input of Q1 by
network R30 and C6. This feedback provides high
frequency roll off in the loop gain to stabilize the
feedback loop.
4-18 DRIVER AND ERROR AMPLIFIER
4-19 The driver and error amplifier circuit raises the
level of the error signal from the constant voltage input
circuit to a sufficient amount to drive the series
regulator. Common emitter amplifier Q10 also receives
a current limiting input when CR8 becomes forward
biased.
4-20 CURRENT LIMIT CIRCUIT
4-14 The constant voltage input circuit continuously
compares a fixed reference voltage with a portion of the
output voltage and, if a difference exists, produces an
error voltage whose amplitude and phase is proportional
to the difference. The error output is fed back to the
series regulator, through the error and driver amplifiers.
The error voltage changes the conduction of the series
regulator which, in turn, alters the output voltage so that
the difference between the two input voltages applied to
the differential amplifier is reduced to zero. The above
action maintains the output voltage constant.
4-21 The output current flows through R23 producing a
voltage drop of one volt for 500 mA output current.
Current limit control, R25 is attached to R23 and goes
positive as the output current increases. When this
positive voltage is great enough to overcome the
negative voltage resulting from the current limit control
setting Q5 is turned on. This action causes test point 21
to fall to about zero volts, forward biasing CR8 and
carrying the base of Q10 sufficiently negative to turn it
off, thus turning off the series regulator. R27 and CR4
provide a -0.7V bias for the emitter of Q5.
4-15 The base of Q1A is connected to the junction of
the programming resistors and the current pullout
resistor (R18 or R19) through a current limiting
resistor, R1. Note that when internal programming is
used, R19 is the current pullout resistor, having similar
temperature characteristics as the front panel voltage
control. In remote programming, R18 is the current
pullout, having as low a temperature coefficient as
possible. Diodes CR1 and CR2 limit voltage
excursions on the base of Q1A. R1 limits the current
through the programming resistors under the condition
of rapid voltage turndown. Capacitor C4 shunts the
programming resistor to increase the high frequency
gain of the amplifier. The programming current is
determined primarily by the reference voltage and the
pullout resistor, R18 or R19. R17 in series with the
pullout resistor serves as a trimming adjustment of the
programming current.
4-22 OVEN CONTROL CIRCUIT
4-23 The oven temperature is sensed by thermistor R57.
If the temperature is too low, the resistance of R57 will
be high enough to bias the emitter of unijunction
transistor Q16 sufficiently positive for it to act as a freerunning pulse generator. These pulses are coupled
through C23 and R62 to the gate of the SiliconControlled Rectifier CR31. The first pulse in any halfcycle of line voltage will cause CR31 to conduct and
remain conducting to the end of that half-cycle. When
CR31 is conducting, current flows through the oven
heater winding raising the temperature. When the
temperature is high enough, R57 will have decreased
sufficiently to lower the emitter bias of Q16, stopping its
output pulses and leaving CR31 off.
4-3
S2 SWITCH POSITIONS
4-24 REFERENCE CIRCUIT
4-25 The reference circuit is a feedback power supply
similar to the main supply. It provides stable reference
voltages which are used throughout the unit. The
reference voltages are all derived from raw dc obtained
from the full wave rectifier (CR24 and CR25) and filter
capacitor C16. The +6.2 and –9.4 voltages, which are
used in the constant voltage input circuit for comparison
purposes, are developed across temperature compensated Zener diodes VR1 and VR2. Resistor R49
limits the current through the Zener diodes to establish
an optimum bias level.
MODEL
6101A
6102A
6106A
6111A
6112A
6113A
6116A
1
2.5V
5V
12V
2.5V
5V
2.5V
12V
2
25V
50V
120V
25V
50V
25V
120V
3
1.2A
.6A
.25A
1.2A
.6A
2.5A
.25A
4
.12A
.06A
.025A
.12A
.06A
.25A
.025A
+
CURRENT
SAMPLING
R23
R67
VOLTAGE
CAL
S2C
4-26 The reference circuit is a closed loop feedback
regulator which acts to maintain the voltage at point 16
at 12.4 volts regardless of line voltage variation. Any
difference between the zener reference diode VR1 and
one-half of the 12.4 volt bus as sampled by R47 and
R48 is amplified by Q14 and Q15 connected as a
differential amplifier. The error is further amplified by
Q13 and is applied to the base of series regulator Q12
which controls the output voltage of the reference
circuit.
S2B
1
1
4
2
4
2
3
3
THERMISTOR
R22
R42
+
-OUT
R21
R66
SELECTED
R69
M
-
A. VOLTAGE MONITORING
4-27 Zener diode VR2 is added in series with the
reference outputs to provide a –9.4 volt bias output. The
main reference voltage is the +6.2 volt zener VR1. The
12.4 volt output is used as a stable bias source. Diode
CR19 provides initial start-up bias for the reference
circuit when the power supply is first turned on.
+
R50
CURRENT
SAMPLING
3
R65
-OUT
R23
CURRENT
CAL
4
3
2
1
4
S2A
4-28 METER CIRCUIT
R64
4-30 With METER switch S2 set to either voltage
position 1 or 2 (Figure 4-3A), the meter is connected in
series with R21, R69, R66, R22, and R42 across the
output of the supply. Resistor R66 calibrates the meter
for full scale deflection to compensate for slight
resistance variations inherent in different meter
movements. Thermistor R22 compensates for the
change in meter resistance as a function of temperature,
and R42 linearizes the resistance slope of R22 to match
the meter resistance slope.
1
S2B
R22
4-29 The meter circuit provides continuous indications
of output voltage or current on a single multiple range
meter. The meter can be used either as a voltmeter or an
ammeter depending upon the position of METER switch
S2 on the front panel of the supply. This switch also
selects one of two meter ranges on each scale. The meter
circuit consists of METER switch S2, various
multiplying resistors and the meter movement.
2
THERMISTOR
R42
R66
SELECTED
+
M
-
B. CURRENT MONITORING
Figure 4-3. Meter Circuit, Simplified Schematic
METER switch S2C shunts R69 in position 1 (the low
voltage range). Thus, in the low voltage range the meter
receives 10 times the amount of current that it receives
in the high voltage range, for the same power supply
output.
4-32 With METER switch S2 set to either current
position 3 or 4 (Figure 4-3B), the meter is connected
across the current sampling resistor R23. Current
calibrate potentiometer R65 is adjusted for proper full
scale meter deflection in the current ranges. METER
switch S2A shunts R64 in position 4 (the low current
range).
4-31 Voltage Adjust potentiometer R67 shunts a small
amount of meter current and is adjusted for proper full
scale meter deflection in the voltage ranges.
4-33 The meter is manufactured with a foolproof
movement, that is, it can withstand a current overload of
more than 10 times the maximum rated without injury.
4-4
SECTION V
MAINTENANCE
5-1 INTRODUCTION
5-2 Upon receipt of the power supply, the performance
check (Paragraph 5-10) should be made. This check is
suitable for incoming inspection. If a fault is detected in
the power supply while making the performance check
or during normal operation, proceed to the troubleshooting procedures (Paragraph 5-27). After troubleshooting
and repair (Paragraph 5-37), perform any necessary
adjustments and calibrations (Paragraph 5-39). Before
returning the power supply to normal operation, repeat
the performance check to ensure that the fault has been
properly corrected and that no other faults exist. Before
doing any maintenance checks, turn-on power supply,
allow a half-hour warm-up, and read the general
information regarding measurement techniques
(Paragraph 5-3).
5-3 GENERAL MEASUREMENT TECHNIQUES
5-4 The measuring device must be connected across
the sensing leads of the supply or as close to the output
terminals as possible when measuring the output
impedance, transient response, regulation, or ripple of
the power supply in order to. achieve valid
measurements. A measurement made across the load
includes the impedance of the leads to the load and such
lead lengths can easily have an impedance several
orders of magnitude greater than the supply impedance,
thus invalidating the measurement.
OUTPUT TERMINAL
5-5 The monitoring device should be connected to the
rear +S and –S terminals (see Figure 3-2) or as shown in
Figure 5-1. The performance characteristics should
never be measured on the front terminals if the load is
connected across the rear terminals. Note that when
measurements are made at the front terminals, the
monitoring leads are connected at A, not B, as shown in
Figure 5-1. Failure to connect the measuring device at A
will result in a measurement that includes the resistance
of the leads between the output terminals and the point
of connection.
5-6 For output current measurements, the current
sampling resistor should be a four-terminal resistor. The
four terminals are connected as shown in Figure 5-2. In
addition, the resistor should be of the low noise, low
temperature coefficient (less than 30 ppm/°C) type and
should be used at no more than 5% of its rated power so
that its temperature rise will be minimized.
CURRENT SAMPLING TERMINALS
EXTERNAL
LOAD
TO UNGROUNDED
TERMINAL OF
POWER SUPPLY
SAMPLING
RESISTOR
LOAD
TERMINALS
TO GROUNDED
TERMINAL OF
POWER SUPPLY
Figure 5-2. Output Current Measurement Technique
5-7 When using an oscilloscope, ground one terminal
of the power supply and then ground the case of the
oscilloscope to this same point. Make certain that the
case is not also grounded by some other means (power
line). Connect both oscilloscope input leads to the power
supply ground terminal and check that the oscilloscope
is not exhibiting a ripple or transient due to ground
loops, pick-up, or other means.
A
B
LOAD LEAD
MONITOR HERE
5-8 TEST EQUIPMENT REQUIRED
5-9 Table 5-1 lists the test equipment required to
perform the various procedures described in this
Section.
Figure 5-1. Front Panel Terminal Connections
5-1
Table 5-1. Test Equipment Required
Type
Required
Characteristics
Use
Recommended
Model
Differential
Voltmeter
Sensitivity: 1mV full scale
(min.). Input impedance:
10 megohms (min.).
Measure DC voltages;
calibration procedures
Variable
Voltage
Transformer
Range: 90-130 volts.
Equipped with voltmeter
accurate within 1 volt.
Vary AC input
AC Voltmeter
Accuracy: 2%. Sensitivity:
1mV full scale deflection
(min.).
Measure AC voltages and ripple
Oscilloscope
Sensitivity: 100µV/cm
Differential input.
Display transient response
waveforms
Oscillator
Range: 5 cps to 600Kc.
Accuracy: 2%
Impedance checks
200CD
DC Voltmeter
Accuracy: 1%. Input resistance:
20,000 ohms/volt (min.).
Measure DC voltages
412 A
Repetitive
Load Switch
Rate: 60 - 400 Hz, 2µsec
rise and fall time.
Measure transient response
See Figure 5-7
Resistive
Loads
Values: See Paragraph 5-14 and
Figure 5-4, ±5%, 75 watts.
Power supply resistors
---------------------------
Current
Sampling
Resistor
Value: See Figure 5-4,
1%, 40 watts, 20ppm,
4-Terminal.
Measure current; calibrate
meter
---------------------------
Resistor
1KΩ ±1%, 2 watt non-inductive
Measure impedance
---------------------------
Resistor
100 ohms, ±5%, 10 watt.
Measure impedance
---------------------------
Resistor
Value: See Paragraph 5-49,
±0.1%, ½ watt.
Calibrate programming current
---------------------------
Capacitor
500µF, 50wvdc
Measure impedance
---------------------------
Decade
Resistance
Box
Range: 0-500K.
Accuracy: 0.1% plus 1 ohm
Make-before-break contacts.
Measure programming
coefficients
---------------------------
5-2
3420 (See Note)
---------------------------
430 B
140 A plus
1400A plug in.
5-12 RATED OUTPUT AND METER ACCURACY
5-10 PERFORMANCE TEST
5-13 Voltage.
5-11 The following test can be used as an incoming
inspection check and appropriate portions of the test can
be repeated either to check the operation of the
instrument after repairs or for periodic maintenance
tests. The tests are performed using a 115-VAC 60 cps.,
single phase input power source. If the correct result is
not obtained for a particular check, do not adjust any
controls; proceed to troubleshooting (Paragraph 5-27).
a. Connect load resistor across rear output
terminals of. supply for full load output. Resistor
value to be as follows:
Model No. 6101A 6102A 6106A 6111A 6112A
Resistance 20Ω
80Ω
500Ω
20Ω
80Ω
Model No. 6113A 6116A
Resistance 5Ω
500Ω
b. Connect differential voltmeter across +S and
–S terminals of supply observing correct polarity.
c. Set METER switch to highest voltage range
and turn on supply.
d. Adjust VOLTAGE controls until front panel
meter indicates exactly the maximum rated output
voltage.
e. Differential voltmeter should indicate
maximum rated output voltage within ±2%.
NOTE
A satisfactory substitute for a differential voltmeter is to
arrange a reference voltage source and null detector as
shown in Figure 5-3. The reference voltage source is
adjusted so that the voltage difference between the
supply being measured and the reference voltage will
have the required resolution for the measurement being
made. The voltage difference will be a function of the
null detector that is used. Examples of satisfactory null
detectors are:
419 A null detector, a DC coupled
oscilloscope utilizing differential input, or a 50 mV
meter movement with a 100 division scale. For the
latter, a 2 mV change in voltage will result in a meter
deflection of four divisions.
POWER SUPPLY
UNDER TEST
Proceed as follows:
5-14 Current.
Proceed as follows:
a. Connect test setup shown in Figure 5-4.
b. Turn CURRENT controls fully clockwise.
c. Set METER switch to highest current range
and turn on supply.
d. Adjust VOLTAGE controls until front panel
meter indicates exactly the maximum rated output
current.
e. Differential voltmeter should read 1.0 ± 0.02
V dc.
REFERENCE
VOLTAGE
SOURCE
POWER SUPPLY
UNDER TEST
DIFFERENTIAL
VOLTMETER
LOAD
G
RY
LOAD
RESISTOR
NULL DETECTOR
CURRENT
SAMPLING
RESISTOR
RX
Figure 5-3. Differential Voltmeter
Substitute Test Setup
MODEL NO.
6101A
6102A
6106A
6111A
6112A
6113A
6116A
CAUTION
Care must be exercised when using an electronic null
detector in which one input terminal is grounded to
avoid ground loops and circulating currents.
RESISTANCE (OHMS)
RX
RY
1
19
2
78
5
495
1
19
2
78
0.5
4.5
5
495
Figure 5-4. Output Current, Test Setup
5-3
5-1
LOAD REGULATION (Front Terminals)
d. Adjust variable auto transformer for 105
VAC input.
e. Set METER switch to highest voltage range
and turn on supply.
f. Adjust VOLTAGE controls until front panel
meter indicates exactly the maximum rated output
voltage.
g. Read and record voltage indicated on
differential voltmeter.
h. Adjust variable auto transformer for 125
VAC input.
i. Reading on differential voltmeter should not
vary from reading recorded in step g by more than the
following:
Model No.
6101A 6102A 6106A 6111A
Variation (mvdc)
0.2
0.4
1
0.2
Model No.
6112A 6113A 6116A
Variation (mvdc)
0.4
0.1
1
5-16 To check constant voltage load regulation,
proceed as follows:
a. Connect test setup as shown in Figure
5-5.
b. Turn CURRENT controls fully clockwise.
c. Set METER switch to highest current range
and turn on supply.
d. Adjust VOLTAGE controls until front panel
meter indicates exactly the maximum rated output
voltage.
e. Read and record voltage indicated on
differential voltmeter.
f. Disconnect load resistors.
g. Reading on differential voltmeter should not
vary from reading recorded in step e by more than the
following:
Model No.
6101A 6102A 6106A 6111A
Variation (mvdc)
0.8
0.75
1.2
0.8
Model No.
6112A 6113A 6116A
Variation (mvdc)
0.75
1.2
1.2
5-19 RIPPLE AND NOISE
1[
5-20 To check the ripple and noise, proceed as follows:
a. Retain test setup used for previous line
regulation test except connect oscilloscope across output
terminals as shown in Figure 5-6.
b. Adjust variable auto transformer for 125
VAC input.
c. Set METER switch to highest current
range.
d. Turn CURRENT controls fully clockwise
and adjust VOLTAGE controls until front panel meter
indicates exactly the maximum rated output voltage.
e. Oscilloscope should indicate 100µV
peak-to-peak or less.
5-17 LINE REGULATION (Front Terminals)
5-18 to check the line regulation, proceed as
follows:
a. Connect variable auto transformer between
input power source and power supply power input.
b. Turn CURRENT controls fully clockwise.
c. Connect test setup shown in Figure 5-5.
POWER SUPPLY
UNDER TEST
RX
POWER SUPPLY
UNDER TEST
RESISTANCE (OHMS)
RX
RY
1
19
2
78
5
495
1
19
2
78
0.5
4.5
5
495
MODEL NO.
6101A
6102A
6106A
6111A
6112A
6113A
6116A
RX
RY
RY
LOAD RESISTORS
DIFFERENTIAL
VOLTMETER
OSCILLOSCOPE
140A
G
G
Figure 5-6. Ripple and Noise, Test Setup
Figure 5-5. Load Regulation, Test Setup
5-4
Ir
!!
5-21 TRANSIENT RECOVERY TIME
LOADING
5-22 To check the transient recovery time proceed as
follows:
a. Connect test setup shown in Figure 5-7.
b. Turn CURRENT controls fully clockwise.
c. Set METER switch to highest current
range and turn on supply.
d. Adjust VOLTAGE controls until front
panel meter indicates exactly the maximum rated
output voltage.
e. Close line switch on repetitive load switch
setup.
f. Adjust 25K potentiometer until a stable
display is obtained on oscilloscope. Waveform
should be within the tolerances shown in Figure 5-8
(output should return to within 10 mV of original
value in less than 50 microseconds).
50µsec
10mV
10mV
50µsec
Figure 5-8. Transient Recovery Time, Waveforms
5-23 OUTPUT IMPEDANCE
5-24 To check the output impedance, proceed as
follows:
a. Connect test setup as shown in Figure 5-9.
OSCILLOSCOPE
140A
POWER SUPPLY
UNDER TEST
UNLOADING
G
VOLTMETER
403B
INDICATES Eo
CONTACT PROTECTION
NETWORK
1µF
400V
25K
2W
115V
60 HZ
5Ω 5W
(NOTE 3)
11K
3W
RY
RX
NOTES:
1. THIS DRAWING SHOWS
A SUGGESTED METHOD
OF BUILDING A LOAD
SWITCH. HOWEVER,
OTHER METHODS COULD
BE USED; SUCH AS A
TRANSISTOR SWITCHING
NETWORK. MAXIMUM
LOAD RATINGS OF LOAD
NOTE 2
SWITCH ARE: 5 AMPS,
500V, 250W (NOT 2500W).
REPETITIVE LOAD
SWITCH (NOTE 1)
POWER SUPPLY
UNDER TEST
6101A
6102A
6106A
6111A
6112A
6113A
6116A
OSCILLATOR
200CD
G
1K
500 MFD
100 OHM
2. USE MERCURY RELAY;
CLARE TYPE HGP 1002 OR
W. E. TYPE 276B
Figure 5-9. Output Impedance, Test Setup
3. USE WIRE WOUND RESISTOR
MODEL NO.
VOLTMETER
403B
INDICATES Ein
b. Set METER switch to highest voltage range,
turn CURRENT controls fully clockwise, and turn on
supply.
c. Adjust VOLTAGE controls until front panel
meter reads 20 volts (10 volts for Model 6113A
supplies).
d. Set AMPLITUDE control on Oscillator to 10
volts (Ein), and FREQUENCY control to 10 cps.
e. Record voltage across output terminals of the
power supply (Eo) as indicated on AC voltmeter.
f. Calculate the output impedance by the
following formula:
𝐸𝑜 𝑅
𝑍𝑜𝑢𝑡 =
𝐸𝑖𝑛 − 𝐸𝑜
Eo = rms voltage across power supply output
terminals.
R = 1000
Ein = 10 volts
RESISTANCE (OHMS)
RX
RY
1
19
2
78
5
495
1
19
2
78
0.5
4.5
5
495
Figure 5-7. Transient Recovery Time, Test Setup
NOTE
If the unloading waveform is unobtainable, use
a smaller value capacitor in the contact
protection network illustrated in Figure 5-7.
5-5
The performance test (Paragraph 5-10) enables this to be
determined without having to remove the instrument
from the cabinet.
g. The output impedance (Zout) should be less
than 0.002 ohm.
h. Using formula of step f, calculate output
impedance at frequencies of 100cps, 1Kc, and 500Kc.
Values should be less than 0.02 ohm, 0.5 ohm, and 3
ohms, respectively.
5-31 Once it is determined that the power supply is at
fault, check for obvious troubles such as open fuse, a
defective power cable, or an input power failure. Next,
remove the top and bottom covers (each held by four
retaining screws) and inspect for open connections,
charred components, etc. If the trouble source cannot be
detected by visual inspection, follow the detailed
procedure outlined in succeeding paragraphs. Once a
defective component has been located (by means of
visual inspection or trouble analysis) correct it and
reconduct the performance test. If a component is
replaced, refer to the repair and replacement, and
adjustment and calibration paragraphs in this section.
5-25 CURRENT LIMIT
5-26 To check the current limit circuit, proceed as
follows:
a. Set the METER switch to the highest
voltage range.
b. Turn the VOLTAGE controls fully clockwise.
c. Turn the CURRENT control fully counterclockwise.
d. The voltage should reduce to zero.
e. Connect a short circuit across the output
terminals.
f. Set the METER switch to the highest current
range.
g. Turn the CURRENT control fully clockwise.
h. The current should increase to, but not
exceed the following:
Model
6101A 6102A 6106A 6111A
Current Limit (A) 1.05
0.52
0.21
1.05
Model
6112A 6113A 6116A
Current Limit (A) 0.52
2.1
0.21
5-32 A good understanding of the principles of
operation is a helpful aid in troubleshooting, and it is
recommended that the reader review Section IV of the
manual before attempting to troubleshoot the unit in
detail. Once the principles of operation are understood,
logical application of this knowledge used in
conjunction with the normal voltage readings shown on
the schematic and the additional procedures given in the
following paragraphs should suffice to isolate a fault to
a component or small group of components. The normal
voltages shown on the schematic are positioned adjacent
to the applicable test points (identified by encircled
numbers on the schematic and printed wiring boards).
Additional test procedures that will aid in isolating
troubles are as follows:
5-27 TROUBLESHOOTING
a. Reference circuit check (Paragraph 5-34). This
circuit provides critical operating voltages for the supply
and faults in the circuit could affect the overall operation
in many ways.
b. Feedback loop checks (Paragraph 5 -35).
c. Procedures for isolating common troubles
(Paragraph 5-36).
5-28 Components within Hewlett-Packard power
supplies are conservatively operated to provide
maximum reliability. In spite of this, parts within a
supply may fail. Usually the instrument must be
immediately repaired with a minimum of ''down time"
and a systematic approach as outlined in succeeding
paragraphs can greatly simplify and speed up the repair.
5-29 TROUBLE ANALYSIS
5-30 General.
Before attempting to trouble shoot this
instrument, ensure that the fault is with the instrument
and not with an associated circuit.
5-33 The test points referred to throughout the
following procedures are identified on the schematic
diagram by encircled numbers.
Table 5-2. Reference Circuit Troubleshooting
Step
Meter
Common
Meter
Positive
Normal
Indication
If Indication Abnormal, Take This Action
1
+S
30
6.2 ± 0.3vdc
Check 12.4 volt bias or VR1
2
34
+S
9.4± 0.4vdc
Check 12.4 volt bias or VR2
3
+S
16
12.4± 1.0vdc
Check Q12-Q15, CR24, CR25, C16, T1
5-6
5-34 Reference Circuit
d. Proceed as instructed in Table 5-2.
a. Make an ohmmeter check to be certain that
neither the positive nor negative output terminal is
grounded.
b. Turn front-panel VOLTAGE and CURRENT
controls fully clockwise (maximum).
c. Turn-on power supply (no load connected).
5-35 Feedback Circuit. Generally, malfunction of the
feedback circuit is indicated by high or low output
voltages. If one of these situations occurs, disconnect
the load and proceed as instructed in Table 5-3 or Table
5-4.
Table 5-3. High Output Voltage Troubleshooting
Step
Measure
1
Voltage between +S and A5
a. +0.6V
b. 0V or negative
a. Open strap between A8 and –S.
R20 open.
b. Proceed to Step 2.
2
Voltage between 13 and 14
a. More negative than –0.1V.
b. Within ±0.1V of 0V.
c. More positive than +0.1V.
a. Q1A shorted, R1, R2 open.
b. C6, C3 shorted.
c. Proceed to Step 3.
3
Voltage between +S and 25
a. More negative than +0.5V.
b. More positive than +0.5V.
a. Q7, C8, CR9, R32 shorted.
Q8, R23, R31, R33 open.
b. Proceed to Step 4.
a. 0V to +0.2V.
b. More positive than 0.2V.
a. Q10 or Q11 shorted.
b. Q9 open, R35 shorted.
4
(-)
(+)
Voltage between +S and 27
Response
Probable Cause
Table 5-4. Low Output Voltage Troubleshooting
Step
Measure
(–)
(+)
Response
Probable Cause
1
Disable Q5 by
disconnecting CR8
a. Normal output voltage.
b. Low output voltage
a. Current limit circuit faulty,
check CR8, Q5, and R26 for
short.
b. Reconnect CR8 and proceed to
Step 2
2
Voltage between +S and A5
a. More negative than +0.1V.
b. +0.1V to +0.8V.
a. C4 shorted, R17, R18 open.
b. Proceed to step 3.
3
Voltage between 13 and 14
a. More positive than +0.1V.
b. More negative than –0.1V.
a. Q1A open. R1, R2 open.
b. Proceed to step 4.
5-7
Table 5-4. Low Output Voltage Troubleshooting (Continued)
4
Voltage between +S and 25
a. More positive than +0.6V.
b. More negative than +0.5V.
a. Q8 shorted, Q7 open, C10
shorted.*
b. Proceed to Step 5.
5
Voltage between +S and 27
a. More positive than 1V.
b. More negative than 0V.
a. Q10, Q11 open. R38 shorted.
b. Q9, CR10, CR11, CR12, C9
shorted.
CR13, CR14, CR15 open. R35
open.
*
Check Q9 and CR9 for damage
Symptom
High ripple
Poor line regulation
Poor load regulation
(Constant Voltage)
Oscillates
a. Constant Voltage
Operation
b. Current Limit
Operation
Poor Stability
(Constant Voltage)
a.
b.
c.
a.
a.
b.
c.
Table 5-5. Common Troubles
Checks and Probable Causes
Check operating setup for ground loops.
If output floating, connect 1µF capacitor between output and ground.
Ensure that supply is not crossing over to current limit mode under loaded
conditions. Check for low voltage across C19.
Check reference circuit (Paragraph 5-34)
Measurement technique. (Paragraph 5-15)
Check reference circuit (Paragraph 5-34)
Ensure that supply is not going into current limit. Check current limit
circuit
a.
C6, R30, C3, R9, C7, R34, C8, or C9 open
b.
C5, R29, or C9 open
a.
b.
c.
d.
e.
Check ±6.2Vdc reference voltages (Paragraph 5-34).
Noisy programming resistor R20.
CR1, CR2 leaky.
Check R10, R11, VR1 for noise or drift.
Stage Q1 defective.
5-36 Common Troubles.
Table 5-5 lists the
symptoms, checks, and probable causes for common
troubles.
replaceable parts. Before replacing a semiconductor
device, refer to Table 5-6 which lists the special
characteristics of selected semiconductors. If the device
to be replaced is not listed in Table 5-6, the standard
manufacturers part number listed in Section VI is
applicable. After replacing a semiconductor device,
refer to Table 5-7 for checks and adjustments that may
be necessary.
5-37 REPAIR AND REPLACEMENT
5-38 Before servicing a printed wiring board, refer to
Figure 5-10. Section VI of this manual contains a list of
5-8
Excessive heat or pressure can lift the copper strip from the board. Avoid damage by using a low
power soldering iron (50 watts maximum) and following these instructions. Copper that lifts off the
board should be cemented in place with a quick drying acetate base cement having good electrical
insulating properties.
A break in the copper should be repaired by soldering a short length of tinned copper wire across the
break.
Use only high quality rosin core solder when repairing etched circuit boards. NEVER USE PASTE
FLUX. After soldering, clean off any excess flux and coat the repaired area with a high quality
electrical varnish or lacquer.
When replacing components with multiple mounting pins such as tube sockets, electrolytic
capacitors, and potentiometers, it will be necessary to lift each pin slightly, working around the
components several times until it is free.
WARNING: If the specific instructions outlined in the steps below regarding etched circuit boards
without eyelets are not followed, extensive damage to the etched circuit board will result.
1. Apply heat sparingly to lead of component to
be replaced. If lead of component passes through
an eyelet in
the circuit
board, apply
heat on
component
side of
board. If
lead of
component does not pass through an eyelet,
apply heat to conductor side of board.
2. Reheat solder in vacant eyelet and quickly
insert a small awl to clean inside of hole. If hole
does not
CONDUCTOR
have an
SIDE
eyelet,
insert awl
or a #57
drill from
conductor
side of
board.
3. Bend clean tinned lead on new part and
carefully insert
through eyelets or
holes in board.
4. Hold part against board (avoid overheating)
and solder leads.
Apply heat to component leads on correct
side of board
as explained
in step 1
In the event that either the circuit board has been damaged or the conventional method is
impractical, use method shown below. This is especially applicable for circuit boards without
eyelets.
1. Clip leads as shown below.
2. Bend protruding leads upward. Bend lead of
new
APPLY
SOLDER
CLIP
HERE
component around
protruding
lead. Apply
solder using a pair of long nose pliers as a heat
sink.
This procedure is used in the field only as an alternate means of repair. It is not used within the
factory.
Figure 5-10. Servicing Printed Wiring Boards
5-9
Table 5-6. Selected Semiconductor Characteristics
Reference
Designator
Characteristics
Suggested
Replacement
stock No.
Q1
Diff. Amp. NPN
1854-0221
2N4045
Q2, Q3, Q9,
Q10, Q13-Q15
SS NPN Silicon
1854-0027
2N2714
CR1, CR2, CR4,
CR8, CR9,
CR16, CR31
Diode, Silicon
1901-0033
1N485B
Sylvania
CR10, CR13,
CR20
Diode, Sil, 2.4V @
100mA
1901-0460
1N4830
G.E.
CR19, CR23
Rect. Sil. Stabistor
200mA, 10prv
1901-0461
1N4828
G.E.
CR24-CR29,
CR30B,
CR32-CR34
Rect. Silicon
500mA, 200prv
1901-0026
1N3253
G.E.
Table 5-7. Checks and Adjustments After Replacement of Semiconductor Devices
Function
Reference
Check
Adjust
R14
Ql, Q2, Q3,
Q7, Q8, Q9
Voltage error amplifier
Voltage load regulation
Remote programming
Q10, Q11,
Series Regulator
Voltage load regulation
Q5
Current Limit Amplifier
Current limit operation
Q12,13,14,
15
Reference Circuit Amplifier
+6.2V line regulation
Q16
Oven Control Pulse Generator
Oven temperature setting
CR1,2
Protection Diode
Voltage-load regulation
CR4,10,13
Forward Bias Regulators
Voltage across each diode
0.6 to 0.85 volts
CR8
Current Limit Coupling Diode
Current limit operation
CR9
Overshoot suppressor diode
Turn-on overshoot
CR16
Overshoot suppressor diode
Turn-on overshoot
CR19
Reference Circuit Start-up diode
Reference circuit operation
CR24, 25
Rectifier
Voltage on C16
CR26, 27, 28
Rectifier
Voltage on C17
5-10
R56
Table 5-7. Checks and Adjustments After Replacement of Semiconductor Devices (Continued)
CR29,30,33,
34
Rectifier
Voltage on C19
CR31
Oven SCR
Oven Functioning
CR32
Protection diode
VR1
+6.2 Voltage Reference
Remote Programming
Coefficient, zero crossing
R17,R116
R14
VR2
-9.4 Voltage Reference
Remote Prog, Coefficient
zero crossing
R16
R14
Current meter cal.
Voltage meter cal.
R65
R67
MI, R64, or R66
5-39 ADJUSTMENT AND CALIBRATION
Perform only those ad justments that affect the operation
of the faulty circuit and no others. Table 5-8 summarizes
the adjustments and calibrations contained in the following paragraphs.
5-40 Adjustment and calibration may be required after
performance testing, troubleshooting, or repair and
replacement.
Table 5-8. Calibration Adjustment Summary
Adjustment or Calibration
Paragraph
Control Device
Meter Zero
5-41
Pointer
Voltmeter Tracking
5-43
R67
Ammeter Tracking
5-45
R65
Zero Volt Programming Accuracy
5-47
R6 or R8
Programming Current Level
5-49
R13
5-41 METER ZERO
5-43 VOLTMETER TRACKING
5-42 Proceed as follows to zero meter:
5-44 To calibrate voltmeter tracking, proceed as
follows:
a. Turn off instrument (after it has reached normal
operating temperatur9) and allow 30 seconds for all
capacitors to discharge.
b. Insert sharp pointed object (pen point or awl)
into the small indentation near top of round black plastic
disc located directly below meter face.
c. Rotate plastic disc clockwise (cw) until meter
reads zero, then rotate ccw slightly in order to free
adjustment screw from meter suspension. If pointer
moves, repeat steps b and c.
a. Connect differential voltmeter across supply,
observing correct polarity.
b. Set METER switch to highest voltage range
and turn on supply. Adjust VOLTAGE control until
differential voltmeter reads exactly the maximum rated
output voltage.
c. Adjust R67 until front panel meter also
indicates maximum rated output voltage.
5-11
5-45 AMMETER TRACKING
a. Connect the supply under test for remote
resistance programming as illustrated in Figure 3-3.
5-46 To calibrate ammeter tracking proceed as follows:
a. Connect test setup shown on Figure 5-4.
b. Turn VOLTAGE control fully clockwise and
set METER switch to highest current range.
c. Turn on supply and adjust CURRENT controls
until differential voltmeter reads 1.0 Vdc.
d. Adjust R65 until front panel meter indicates
exactly the maximum rated output current.
5-47 CONSTANT VOLTAGE PROGRAMMING
CURRENT
5-48 Zero Volt Programming Accuracy. To calibrate
the zero volt programming accuracy, proceed as
follows:
a. Connect differential voltmeter between +S and
-S terminals.
b. Short voltage controls by connecting jumper
between terminals A5 and -S.
c. Rotate CURRENT control fully clockwise and
turn on supply.
d. Adjust zero crossing potentiometer R14 until
the meter indicates zero volts.
5-49 Programming Current Level. To calibrate the
constant voltage programming current level, proceed as
follows:
b. Connect a 0.1%, 2-watt programming resistor
between terminals A4 and -S on rear barrier strip.
Resistor value to be as follows:
Model
6101A 6102A 6106A 6111A
Resistance (ohms) 20K
40K
100K
20K
Model
6112A 6113A 6116A
Resistance (ohms) 40K
10K
100K
c. Connect a differential voltmeter between -S
and +5 and turn on the supply.
d. Adjust potentiometer R16 until differential
voltmeter indicates the maximum rated output voltage of
the supply. If the range of R16 is not sufficient to adjust
the output voltage within tolerance proceed to step e.
e. Set potentiometer R16 to the center of its
range.
f. Replace R17 with a resistance decade initially
set for 300 ohms.
g. Adjust the resistance decade until the
differential voltmeter indicates the maximum rated
output voltage of the supply.
h. Replace the decade resistance with a resistor
whose value is as close to the resistance decade as
possible.
i. Readjust R16 until the differential voltmeter
indicates the maximum rated output voltage of the
supply.
5-12
SECTION VI
REPLACEABLE PARTS
6-1 INTRODUCTION
Table 6-1. Reference Designators (Continued)
6-2
This section contains information for ordering
replacement parts. Table 6-4 lists parts in alpha numeric
order by reference designators and provides the
following information:
a. Reference Designators. Refer to Table 6-1.
b. Description. Refer to Table 6-2 for
abbreviations.
c. Total Quantity' Q). Given only the first time the
part number is listed except in instruments containing
many sub-modular assemblies, in which case the TQ
appears the first time the part number is listed in each
assembly.
d. Manufacturer's Part Number or Type.
e. Manufacturer's Federal Supply Code Number.
Refer to Table 6-3 for manufacturer's name and address.
f. Hewlett-Packard Part Number.
g. Recommended Spare Parts Quantity (RS) for
complete maintenance of one instrument during one
year of isolated service.
h. Parts not identified by a reference designator
are listed at the end of Table 6-4 under Mechanical
and/or Miscellaneous. The former consists of parts
belonging to and grouped by individual assembles; the
latter consists of all parts not immediately associated
with an assembly.
P
Q
R
S
T
TB
TS
A
ac
= ampere
= alternating
current
assy. = assembly
bd
= board
bkt
= bracket
°C
= degree
Centigrade
cd
= card
coef
= coefficient
comp = composition
CRT = cathode-ray
tube
CT
= center-tapped
dc
= direct current
DPDT = double pole,
double throw
DPST = double pole,
single throw
Elect = electrolytic
Encap = encapsulated
F
= farad
°F
= degree
Fahrenheit
Fxd
= fixed
Ge
= germanium
H
= Henry
Hz
= Hertz
IC
= integrated
circuit
ID
= inside diameter
incnd = incandescent
k
= kilo = 103
m
= milli = 10-3
M
= mega = 106
µ
= micro = 10-6
met.
= metal
6-4 To order a replacement part, address order or
inquiry to your local Hewlett-Packard sales office (see
lists at rear of this manual for addresses). Specify the
following information for each part: Model, complete
serial number, and any Option or special modification
(1) numbers of the instrument; Hewlett-Packard part
number; circuit reference designator; and description.
To order a part not listed in Table 6-4, give a complete
description of the part, its function, and its location.
Table 6-1. Reference Designators
=
=
=
=
=
=
assembly
blower (fan)
capacitor
circuit breaker
diode
device, signaling (lamp)
E
F
J
K
L
M
plug
transistor
resistor
switch
transformer
terminal block
thermal switch
V
VR
X
Z
= vacuum tube,
neon bulb,
photocell, etc.
= zener diode
= socket
= integrated circuit or network
Table 6-2. Description Abbreviations
6-3 ORDERING INFORMATION
A
B
C
CB
CR
DS
=
=
=
=
=
=
=
= miscellaneous
electronic part
= fuse
= Jack, jumper
= relay
= inductor
= meter
6-1
Mfr
Mod.
= manufacturer
= modular or
modified
Mtg
= mounting
N
= nano = 10-9
NC
= normally closed
NO
= normally open
NP
= nickel-plated
Ω
= ohm
obd
= order by
description
OD
= outside
diameter
Pico
= 10-12
P. C. = printed circuit
Pot.
= potentiometer
p-p
= peak-to-peak
ppm
= parts per
miliion
pvr
= peak reverse
voltage
rect
= rectifier
rms
= root mean
square
Si
= silicon
SPDT = single pole,
double throw
SPST = single pole,
single throw
SS
= small signal
T
= slow-blow
tan.
= tantalum
Ti
= titanium
V
= volt
var
= variable
ww
= wirewound
W
= Watt
Table 6-3. Code List of Manufacturers
CODE
MANUFACTURER
NO.
00629
00656
00853
CODE
MANUFACTURER
NO.
ADDRESS
EDY Sales Co., Inc.
Jamaica, N. Y.
Aerovox Corp.
New Bedford, Mass,
Sangamo Electric Co
S. Carolina Div.
Pickens, S.C.
Allen Bradley Co.
Milwaukee, Wis.
Litton Industries, Inc Beverly Hills, Calif.
TRW Semiconductors, Inc.
Lawndale, Calif.
Texas Instruments, Inc.
Semiconductor-Components Div,
Dallas, Texas
RCL Electronics, Inc. Manchester, N.H.
Amerock Corp.
Rockford, Ill.
Sparta Mfg, Co.
Dover, Ohio
Ferroxcube Corp.
Saugerties, N.Y.
Fenwal Laboratories Morton Grove, Ill.
Amphenol Corp.
Broadview, Ill.
Radio Corp. of America, Solid State
and Receiving Tube Div. Somerville, N.
J.
G.E. Semiconductor Products Dept,
Syracuse, N.Y.
Eldema Corp.
Compton, Calif.
Transitron Electronic Corp.
Wakefield, Mass.
Pyrofilm Resistor Co, Inc.
Cedar Knolls, N.J.
Arrow, Hart and Hegeman Electric Co.
Hartford, Conn.
ADC Electronics, Inc. Harbor City, Calif.
Caddell & Burns Mfg, Co. Inc.
Mineola, N.Y.
*Hewlett-Packard Co. Palo Alto Div.
Palo Alto, Calif.
Motorola Semiconductor Prod. Inc.
Phoenix, Arizona
Westinghouse Electric Corp.
Semiconductor Dept. Youngwood, Pa.
Ultronix, Inc,
Grand Junction, Colo,
Wakefield Engr. Inc.
Wakefield, Mass.
General Elect. Co. Electronic
Capacitor & Battery Dept.
Irmo, S.C.
Bassik Div, Stewart-Warner Corp.
Bridgeport, Conn.
IRC Div. of TRW Inc.
Semiconductor Plant
Lynn, Mass.
Amatom Electronic Hardware Co. Inc.
New Rochelle, N.Y.
Beede Electrical Instrument Co.
Penacook, N.H.
General Devices Co. Inc.Indianapolis, Ind.
Semcor Div. Components, Inc.
Phoenix, Arizona
Robinson Nugent, Inc. New Albany, Ind.
Torrington Mfg, Co., West Div.
Van Nuys, Calif.
Transistor Electronics Corp.
07138
ADDRESS
Westinghouse Electric Corp.
Electronic Tube Div.
Elmira, N. Y.
07263 Fairchild Camera and Instrument
Corp. Semiconductor Div.
01121
Mountain View, Calif.
01255
07387 Birtcher Corp., The Los Angeles, Calif.
01281
07397 Sylvania Electric Prod. Inc.
Sylvania Electronic Systems
01295
Western Div.
Mountain View, Calif.
07716 IRC Div. of TRW Inc, Burlington Plant
Burlington, Iowa
01686
07910 Continental Device Corp.
01930
Hawthorne, Calif.
02107
07933 Raytheon Co. Components Div,
02114
Semiconductor Operation
02606
Mountain View, Calif.
02660
08484 Breeze Corporations, Inc.
Union, N.J.
02735
08530 Reliance Mica Corp.
Brooklyn, N.Y.
08717 Sloan Company, The Sun Valley, Calif.
03508
08730 Vemaline Products Co. Inc.Wyckoff, N.J.
08806 General Elect. Co. Minia03797
ture Lamp Dept.
Cleveland, Ohio
03877
08863 Nylomatic Corp.
Norrisville, Pa.
08919 RCH Supply Co.
Vernon, Calif.
03888
09021 Airco Speer Electronic Components
Bradford, Pa.
04009
09182 *Hewlett-Packard Co, New Jersey Div,
Berkeley Heights, N.J.
04072
09213 General Elect. Co. Semiconductor
04213
Prod. Dept.
Buffalo. N.Y.
09214 General Elect. Co. Semiconductor
04404
Prod, Dept,
Auburn, N.Y.
09353 C & K Components Inc. Newton, Mass.
04713
09922 Burndy Corp.
Norwalk, Conn.
11115 Wagner Electric Corp.
05277
Tung-Sol Div.
Bloomfield, N.J.
11236 CTS of Berne, Inc.
Berne, Ind.
05347
11237 Chicago Telephone of Cal. Inc.
05820
So. Pasadena, Calif.
06001
11502 IRC Div. of TRW Inc. Boone Plant
Boone, N.C.
06004
11711 General Instrument Corp
Rectifier Div.
Newark, N. J.
06486
12136 Philadelphia Handle Co. Inc.Camden, N.J.
12615 U.S. Terminals, Inc.
Cincinnati, Ohio
06540
12617 Hamlin Inc.
Lake Mills, Wisconsin
12697 Clarostat Mfg. Co. Inc.
Dover, N.H.
06555
13103 Thermalloy Cp,
Dallas, Texas
14493 *Hewlett-Packard Co. Loveland Div.
06666
Loveland, Colo.
06751
14655 Cornell-Dubilier Electronics Div.
Federal Pacific Electric Co.
06776
14936
Newark, N.J.
06812
General Instrumert Corp. Semicon15801
ductor Prod. Group
Hicksville, N.Y.
07137
16299 Fenwal Elect.
Framingham, Mass.
Corning Glass Works, Electronic
Components Div.
Raleigh, N.C.
Minneapolis, Minn.
*Use Code 28480 assigned to Hewlett-Packard Co., Palo Alto, California
6-2
Table 6-3. Code List of Manufacturers (Continued)
CODE
MANUFACTURER
NO.
CODE
MANUFACTURER
NO.
ADDRESS
16758
Delco Radio Div, of General Motors Corp.
Kokomo, Ind,
17545 Atlantic Semiconductors, Inc.
Asbury Park, N. J.
171303 Fairchild Camera and Instrument Corp
Semiconductor Div, Transducer Plant
Mountain View, Calif.
17870 Devon Div. Thomas A. Edison Industries
McGraw-Edison Co,
Orange, 14. I.
18324 Signetics Corp.
Sunnyvale, Calif.
19315 Bendix Corp. The Navigation and
Control Div,
Tetelboro, N. J.
19701 Electra/Midland Corp.
Mineral Wells, Texas
21520 Fansteel Metallurgical Corp.
No. Chicago, Ill.
22229 Union Carbide Corp. Electronics Div,
Mountain View, Calif.
22753 UID Electronics Corp.
Hollywood, Fla.
23936 Pamotor, Inc,
Pampa, Texas
24446 General Electric Co. Schenectady, N.Y.
24455 General Electric Co. Lamp Div. of Consumer Prod, Group
Nela Park, Cleveland, Ohio
24655 General Radio Co. West Concord, Mass.
24681 LTV Electrosystems Inc Memcor/Components Operations
Huntington, Ind.
26982 Dynacool Mfg. Co. inc. Saugerties, N. Y.
27014 National Semiconductor Corp.
Santa Clara, Calif.
28480 Hewlett-Packard Co.
Palo Alto, Calif.
28520 Heyman Mfg. Co.
Kenilworth, N. J.
28875 IMC Magnetics Corp.
New Hampshire Div, Rochester, N. H.
31514 SAE Advance Packaging, Inc.
Santa Ana, Calif.
31827 Budwig Mfg. Co.
Ramona, Calif.
33173 G.E. Co, Tube Dept.
Owensboro, Ky.
35434 Lectrohm, Inc.
Chicago, Ill.
37942 P.R. Mallory & Co. Inc, Indianapolis, Ind.
42190 Muter Co.
Chicago, Ill.
4333'. New Departure-Hyatt Bearings Div,
General Motors Corp. Sandusky, Ohio
44655 Ohmite Manufacturing Co.
Skokie, Ill.
46364 Penn Engr„ and Mfg. Corp.
Doylestown, Pa.
47904 Polaroid Corp.
Cambridge. Mass.
49956 Raytheon Co.
Lexington, Mass,
55026 Simpson Electric Co. Div. of American
Gage and Machine Co.
Chicago, Ill.
56289 Sprague Electric Co. North Adams, Mass,
58474 Superior Electric Co.
Bristol, Conn.
58849 Syntron Div. of FMC Corp.
Homer City, Pa.
59730 Thomas and Betts Co. Philadelphia, Pa.
61637 Union Carbide Corp.
New York, N.Y.
63743 Ward Leonard Electric Co.
Mt. Vernon, N.Y.
*Use Code 71785 assigned to Cinch Mfg. Co., Chicago Ill.
6-3
70563
70901
70903
71218
71279
71400
71450
71468
71590
71700
71707
71744
71785
71984
72136
72619
72699
72765
72962
72982
73096
73138
73168
73293
73445
73506
73559
73734
74193
74545
74868
74970
75042
75183
75376
75382
75915
76381
76385
76487
76493
ADDRESS
Amperite Co. Inc.
Union City, N.J.
Beemer Engrg, Co. Fort Washington, Pa.
Belden Corp.
Chicago, Ill.
Bud Radio, Inc.
Willoughby, Ohio
Cambridge Thermionic Corp.
Cambridge, Mass.
Bussmann Mfg, Div. of McGraw &
Edison Co.
St, Louis, Mo.
CTS Corp.
Elkhart, Ind.
I.T.T. Cannon Electric Inc.
Los Angeles, Calif,
Globe-Union Inc.
Centralab Div.
Milwaukee, Wis.
General Cable Corp, Cornish
Wire Co. Div,
Williamstown, Mass.
Coto Coil Co. Inc.
Providence, R.I.
Chicago Miniature Lamp Works
Chicago, Ill.
Cinch Mfg. Co. and Howard
B. Jones Div.
Chicago, Ill.
Dow Coming Corp.
Midland, Mich.
Electro Motive Mfg, Co. Inc.
Willimantic, Conn.
Dialight Corp.
Brooklyn, N.Y.
General Instrument Corp.
Newark, N.J.
Drake Mfg, Co.
Harwood Heights, Ill.
Elastic Stop Nut Div. of
Amerace Esna Corp.
Union, N.J.
Erie Technological Products Inc. Erie, Pa.
Hart Mfg. Co.
Hartford, Conn.
Beckman Instruments Inc,
Helipot Div.
Fullerton, Calif.
Fenwal, Inc.
Ashland, Mass.
Hughes Aircraft Co. Electron
Dynamics Div.
Torrance, Calif.
Amperex Electronic Corp.
Hicksville, N.Y.
Bradley Semiconductor Corp,
New Haven, Conn.
Carling Electric, Inc.
Hartford, Conn,
Federal Screw Products, Inc. Chicago, Ill.
Heinemann Electric Co.
Trenton, N.J.
Hubbell Harvey Inc.
Bridgeport, Conn.
Amphenol Corp. Amphenol RF Div.
Danbury, Conn.
E. F. Johnson Co.
Waseca, Minn.
IRC Div. of TRW, Inc. Philadelphia, Pa.
*Howard B. Jones Div. of Cinch
Mfg. Corp.
New York, N.Y.
Kurz and Kasch, Inc.
Dayton, Ohio
Kilka Electric Corp.
Mt. Vernon, N.Y.
Litttefuse, Inc.
Des Plaines, Ill.
Minnesota Mining and Mfg. Co.
St. Paul, Minn.
Minor Rubber Co. Inc. Bloomfield, N.J.
James Millen Mfg, Co, Inc.
Malden, Mass.
J. W. Mitier Co.
Compton, Calif.
Table 6-3. Code List of Manufacturers (Continued)
CODE
MANUFACTURER
NO.
76530
76854
77068
77122
77147
77221
77252
77342
77630
77764
78189
78452
78468
78526
78553
78584
79136
79307
79727
79963
80031
80294
81042
81073
81483
81751
82099
82142
82219
82389
82647
82866
82877
82893
83058
83186
83298
83330
83385
83501
CODE
MANUFACTURER
NO.
ADDRESS
Cinch
City of Industry, Calif.
Oak Mfg. Co. Div, of Oak
Electro/Netics Corp. Crystal Lake, Ill.
Bendix Corp., Electrodynamics Div.
No. Hollywood, Calif.
Palnut Co.
Mountainside, N.J.
Patton-MacGuyer Co.
Providence, R.I.
Phaostron Instrument and Electronic Co.
South Pasadena, Calif.
Philadelphia Steel and Wire Corp.
Philadelphia, Pa.
American Machine and Foundry Co.
Potter and Brumfield Div, Princeton, Ind.
TRW Electronic Components Div.
Camden, N.J.
Resistance Products Co. Harrisburg, Pa.
Illinois Tool Works Inc. Shakeproof Div.
Elgin, Ill.
Everlock Chicago, Inc.
Chicago, Ill.
Stackpole Carbon Co.
St. Marys, Pa.
Stanwyck Winding Div. San Fernando
Electric Mfg. Co. Inc. Newourgh, N.Y.
Tinnerman Products, Inc. Cleveland, Ohio
Stewart Stamping Corp.
Yonkers, N.Y.
Waldes Kohinoor, Inc.
L.I.C., N.Y.
Whitehead Metals Inc. New York, N.Y.
Continental-Wirt Electronics Corp.
Philadelphia, Pa.
Zierick Mfg. Co.
Mt. Kisco, N.Y.
Mepco Div. of Sessions Clock Co,
Morristown, N.J.
Bourns, Inc.
Riverside, Calif.
Howard Industries Div. of Msl Ind. Inc.
Racine, Wisc.
Grayhill, Inc,
La Grange, Ill.
International Rectifier Corp.
CI Segundo, Calif.
Columbus Electronics Corp. Yonkers, N.Y.
Goodyear Sundries & Mechanical Co. Inc.
New York, N. Y.
Airco Speed Electronic Components
Du Bois, Pa.
Sylvania Electric Products Inc.
Electronic Tube Div. Receiving
Tube Operations
Emporium, Pa.
Switchcraft, Inc.
Chicago, Ill
Metals and Controls Inc, Control
Products Group
Attleboro, Mass.
Research Products Corp. Madison, Wis.
Rotron Inc.
Woodstock, N.Y.
Vector Electronic Co.
Glendale, Calif.
Garr Fastener Co.
Cambridge, Mass.
Victory Engineering Corp.
Springfield, N.J.
Bendix Corp. Electric Power Div.
Eatontown, N.J.
Herman H. Smith, Inc.
Brooklyn, N.Y.
Central Screw Co.
Chicago, Ill.
Gavin Wire and Cable Div. of
Amerace Esna Corp. Brookfield, Mass.
83508
ADDRESS
Grant Pulley and Hardware Co.
West Nyack, N.Y.
83594 Burroughs Corp. Electronic
Components Div.
Plainfield, N.J.
83835 U. S. Radium Corp.
Morristown, N.J.
83877 Yardeny Laboratories, Inc.
New York, N.Y.
84171 Arco Electronics, Inc. Great Neck, N.Y.
84411 TRW Capacitor Div.
Ogallala, Neb.
86684 RCA Corp. Electronic Components
Harrison, N.J.
86838 Rummel Fibre Co.
Newark, N.J.
87034 Marco & Oak Industries a Div, of Oak
Electro/netics Corp.
Anaheim, Calif.
87216 Philo Corp. Lansdale Div. Lansdale, Pa.
875135 Stockwell Rubber Co, Inc.
Philadelphia, Pa.
87929 Tower-Olschan Corp. Bridgeport, Conn.
88140 Cutler-Hammer Inc. Power Distribution
and Control Div. Lincoln Plant
Lincoln, Ill.
88245 Litton Precision Products Inc, USECO
Div. Litton Industries Van Nuys, Calif.
90634 Gulton Industries Inc,
Metuchen, N.J.
90763 United-Car Inc.
Chicago, Ill.
91345 Miller Dial and Nameplate Co.
El Monte, Calif.
91418 Radio Materials Co.
Chicago, Ill.
91506 Augat, Inc.
Attleboro, Mass.
91637 Dale Electronics, Inc.
Columbus, Neb.
91662 Elco Corp.
Willow Grove, Pa.
91929 Honeywell Inc. Div. Micro Switch
Freeport, Ill.
92825 Whitso, Inc.
Schiller Pk., Ill.
93332 Sylvania Electric Prod. Inc. Semiconductor Prod. Div,
Woburn, Mass.
93410 Essex Wire Corp. Stemco
Controls Div.
Mansfield, Ohio
94144 Ravtheon Co. Components Div.
Ind. Components Oper. Quincy, Mass.
94154 Wagner Electric Corp.
Tung-Sol Div.
Livingston, N.J.
94222 Southco Inc.
Lester, Pa.
95263 Leecraft Mfg. Co. Inc.
L.I.C., N.Y.
95354 Methode Mfg. Co. Rolling Meadows, Ill
95712 Rendix Corp. Microwave
Devices Div.
Franklin, Ind.
95987 Weckesser Co. Inc.
Chicago, Ill.
96791 Amphenol Corp. Amphenol
Controls Div.
Janesville, Wis.
97464 Industrial Retaining Ring Co.
Irvington, N.J.
97702 IMC Magnetics Corp, Eastern Div.
Westbury, N.Y.
98291 Sealectro Corp.
Mamaroneck, N.Y.
98410 ETC Inc.
Cleveland, Ohio
98978 International Electronic Research Corp.
Burbank, Calif.
99924 Rembrandt, Inc.
Boston, Mass.
6-4
Reference
Designator
C1
C2
C3, 13, 21
C5
C5
C6, 8
C7
C9
C10, 14
C11, 12, 22
C15, 18A, 25
C16
C17, 23
C19
C20
C24
CR1, 2, 4
8, 9, 16
CR3, 5-7
11, 12, 14
15, 17, 18
21, 22
CR10, 13, 20
CR19, 23
CR24-28, 32
CR29, 30A
CR31
CR33, 34
Description
fxd. elect 1µf 35vdc
fxd. film 0.1µf 200vdc
fxd. film .033µf 200vdc
fxd. film 1µf 200vdc
fxd. film .22µf 80vdc
fxd. film .001µf 200vdc
fxd. film .068µf 200vdc
fxd. film .0047µf 200vdc
fxd. elect 20µf 50vdc
NOT ASSIGNED
fxd. ceramic .02µf 600vdc
D1S6
fxd. elect 325µf 35vdc
fxd. elect 1450µf 45vdc
fxd. elect 1500µf 40vdc
fxd. film .0022µf 200vdc
fxd. film 1µf 200vdc
Mfr. Part #
Quantity or Type
1
150D105X9035A2
1
192P10492
3
192P33392
1
260P10592S3
1
192P2248R8
2
192P10292
1
192P68392
1
192P47292
2
30D206G050DC4
3
1
2
1
1
1
Diode SI 200prv 250MW
6
NOT ASSIGNED
Diode si. 2.4V @ 100ma
Rect. si. 200ma 10prv
Rect. si. 500ma 200prv
Rect. si. 1A 200prv
SCR 1.6A 50prv
NOT USED
3
2
6
2
1
-
ED – 02
D34656
D39532
D38733
192P22292
118P10592S3
1N3253
1N5059
C6F
-
Ref
Mfr.
Sprague
Sprague
Sprague
Sprague
Sprague
Sprague
Sprague
Sprague
Sprague
-
Mfr.
Code
56289
56289
56289
56289
56289
56289
56289
56289
56289
-
Stock No.
0180-0291
0160-0168
0160-0163
0160-2579
0160-2453
0160-0153
0160-0166
0160-0157
0160-0049
-
RS
1
1
1
1
1
1
1
1
1
-
Erie
HLAB
HLAB
HLAB
Sprague
Sprague
72982
09182
09182
09182
56289
56289
0150-0024
0180-0332
0180-1893
0180-1894
0160-0154
0160-2465
1
1
1
1
1
1
HLAB
09182
1901-0033
6
HLAB
HLAB
R.C.A.
G.E.
G.E.
-
09182
09182
02735
03508
03508
-
1901-0460
1901-0461
1901-0369
1901-0322
1884-0033
-
3
2
6
2
1
-
HLAB
09182
2140-0244
1
Littlefuse 75915
2110-0001
5
DS1
Lamp neon part of S1 ass'y
F1
Fuse cartridge 1A @250V 3AG
1
L1, 2
Coil
2
HLAB
09182
9100-1854
1
Q1
Q2, 3
Q4, 6
Q5
Q7, 8
Q9, 10,
13-15
Q11
Q12
Q16
Dill. amp NPN
SS NPN si.
NOT ASSIGNED
SS NPN si.
SS PNP si.
1
2
1
1
4JX16A1014
2N2907A
HLAB
HLAB
G.E.
Sprague
09182
09182
03508
56289
1854-0221
1854-0027
1854-0071
1853-0099
1
2
1
2
SS NPN si.
Power NPN si.
SS PNP si.
Unijunction si.
5
1
1
1
40362
2N2646
HLAB
HLAB
R.C.A.
G.E.
09182
09182
02735
03508
1854-0027
1854-0225
1853-0041
1855-0010
5
1
1
1
R1, 2
R3
R4
R5, 6
R7, 8
R9
R10
R11
R12
fxd. ww 1KΩ ±5% 3w
fxd. met. film 221KΩ±1% ⅛w
fxd. met. film 27.1KΩ±1% ⅛w
fxd. met. film 432KΩ±1% ⅛w
fxd. met. film 43KΩ±1% ⅛w
fxd. comp 120Ω ±5% ½w
fxd. met. film 390KΩ±1% ⅛w
var. ww 22KΩ ±10%
fxd. met. film 17.8KΩ±1% ¼w
2
1
1
2
2
1
1
1
1
Sprague
I.R.C.
I.R.C.
I.R.C.
I.R.C.
A.B.
I.R.C.
HLAB
I.R.C.
56289
07716
07716
07716
07716
01121
07716
09182
07716
0813-0001
0757-0473
0757-0452
0757-0480
0698-5090
0686-1215
0698-5093
2100-1850
0698-4722
1
1
1
2
2
1
1
1
312001
242E1025
Type CEA T-O
Type CEA T-O
Type CEA T-O
Type CEA T-O
EB-1215
Type CEA T-O
Type CEA T-O
6-5
1
Reference
Designator
R13, 15
R14, 16
R17
R18
R19
R20
R21
R22
R23
R24
R25
R26, 32, 43
R27, 28, 33,
60
R29
R30
R31
R34
R35, 59
R36, 61
R37
R38, 45
R39
R40
R41
R42
R44
R46, 53
R47, 48
R49
R50
R51, 58
R52
R54
R55
R56, 66
R57
R62
R63
R64
R65
R67
R68
R69
Mfr. Part #
Description
Quantity or Type
fxd, met. film 1MEG±1% ⅛w
2
Type CEA T-O
var. ww 15KΩ, ±5% 1W @50°C
2
Model 100
fxd, ww Factory selected,
approx. value is 297 ±1%
¼w TC20ppm
1
fxd, ww 5.9K ±1% 0±5ppm/°C
1
fxd, ww 5.5K ±1%
+ 15 ±5ppm/°C
1
var. ww 10KΩ ±5% 2W @
25°C (10 turn)
1
fxd, met. film 2KΩ ±1% ⅛w
1
Type CEA T-O
Thermister 64Ω ±10%
1
LB 16 J1
fxd, ww 1Ω ±5% 8W
1
Type T-7A
fxd, comp 7.5KΩ ±5% ½w
1
EB-7525
var. ww 1KΩ ±5%
1
fxd, comp 10KΩ ±5% ½w
3
EB-1035
Mfr.
I.R.C.
I.R.C.
Mfr.
Code
07716
07716
Stock No.
0757-0344
2100-0896
RS
1
1
HLAB
HLAB
09182
09182
0811-1929
0811-1978
1
1
HLAB
09182
0811-1957
1
HLAB
I.R.C.
Fenwal
R.C.L.
A.B.
HLAB
A.B.
09182
07716
15801
01686
01121
09182
01121
2100-1866
0757-0283
0837-0023
0811-2133
0686-7525
2100-1847
0686-1035
1
1
1
1
1
1
1
A.B.
A.B.
A.B.
A,B.
A.B.
A.B.
A.B.
A.B.
A. B.
Corning
Sprague
A.B.
I.R.C.
A.B.
A.B.
I.R.C.
HLAB
I. R. C.
A.B.
Sprague
A.B.
A.B.
Gulton
A.B.
I.R.C.
I.R.C.
C.T.S.
C.T. S.
A.B.
I.R.C.
01121
01121
01121
01121
01121
01121
01121
01121
01121
16299
56289
01121
07716
01121
01121
07716
09182
07716
01121
56289
01121
01121
90634
01121
07716
07716
11236
11236
01121
07716
0686-1025
0686-1015
0686-5125
0686-3925
0686-3915
0686-6815
0686-2025
0686-1005
0686-1525
0698-3630
0811-1857
0686-2015
0757-0316
0686-4325
0686-2725
0757-0427
0811-1935
0811-1758
0686-2425
0811-1860
0686-3336
1
1
1
1.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0837-0026
0686-2215
0811-0929
0757-0274
2100-1822
2100-0391
0686-5615
0698-4484
1
1
1
1
1
1
1
1
87034
09182
3101-0100
3100-1911
1
1
HLAB
09182
Transitron 03877
U. S. Semcor 06751
9100-2127
1902-0777
1902-0762
1
1
1
fxd, comp 1KΩ ±5% ½w
fxd, comp 100Ω ±5% ½w
fxd, comp 5.1KΩ ±5% ½w
fxd, comp 3.9KΩ ±5% ½w
fxd, comp 390Ω ±5% ½w
fxd, comp 680Ω ±5% ½w
fxd, comp 2KΩ ±5% ½w
fxd, comp 10Ω ±5% ½w
fxd, comp 1.5KΩ ±5% ½w
fxd, met, ox, 300Ω ±5% 2W
fxd, ww 100Ω ±5% 5W
fxd, comp 200Ω ±5% ½w
fxd, met. film 42.2Ω ±1% ⅛w
fxd, comp 4.3KΩ ±5% ½w
fxd, comp 2.7KΩ ±5% ½w
fxd, met. film 1.5KΩ ±1% ⅛w
fxd, ww 714Ω ±1% ¼w
fxd, ww .24Ω ±5%
NOT ASSIGNED
fxd, comp 2.4KΩ ±5% ½w
fxd, ww 600Ω ±5% 5w
fxd, comp 33KΩ ±5% ½w
fxd, comp SELECTIVE
Thermister 100K ±10%
fxd, comp 220Ω ±5% ½w
fxd, ww .51Ω ±5%
fxd, met. film 1.21KΩ ±1% ⅛w
var. ww 10Ω
var. ww 1KΩ
fxd, comp 560 ±5% ½w
fxd, met, film 19.1KΩ ±1% ⅛w
4
1
1
1
1
2
2
1
2
1
1
1
1
1
2
2
1
1
1
1
1
2
1
1
1
1
1
1
1
1
EB-1025
EB-1015
EB-5125
EB-3925
EB-3915
EB-6815
EB-2025
EB-1005
EB-1525
Type C425
243E4015
EB-2015
Type CEA T-O
EB-4325
EB-2725
Type CEA T-O
S1
S2
Switch, pilot lt. (red) ON/OFF
Switch, wafer
1
1
54-61681-26 AlH Oak
HLAB
T1
VR1
VR2
Power Transformer
Zener 6.2V ±5% 250 mW
Diode-Zener 9.4V±5% 500mV
1
1
1
1N825
1N2163
Type BWH
EB-2428
243E601,5
EB-3335
Type -EB
51 TG 4
EB-2215
Type BWH
Type CEA T-O
Type 110-F4
Type 110-F4
EB-5615
Type CEA T-O
6-6
Reference
Designator
Mfr. Part #
Description
Quantity or Type
Mfr.
5 Way binding post (red)
1
DF21 (maroon) HLAB
5 Way binding post (black)
2
DF21 (bl)
Superior
Cable clamp ¼ I. D.
1
T4-4
Whitehead
Line cord plug PH151 7½ ft.
1
KH-4096
Beldon
Strain relief bushing
1
SR-5P-1
Heyco
Knob ¼ insert pointer
2
HLAB
Knob ⅝ dia
2
HLAB
Jumper
7
422-13-11 013 Linch
Barrier strip
1
HLAB
Rubber bumper
4
MB50
Stockwell
Bezel 1/6 MOD
1
HLAB
Fuse holder
1
342014
Littlefuse
Meter 2¼" DUAL 0-24V 0-1.2A
1
HLAB
Heat dissipater
1
NF-207
Walefield
Spring
4
HLAB
Fastener
8
C8091 632-248 Tinnerman
Mica insulator
1
734
Reliance
Insulator, Transistor pin
2
HLAB
Insulator
2
HLAB
Can-outer
1
HLAB
Can-inner
1
HLAB
Side chassis - right
1
HLAB
Side chassis - left
1
HLAB
Bracket - heat sink
2
HLAB
Blank panel - front
1
HLAB
Panel front
1
HLAB
Cover
2
HLAB
Guard-angle
1
HLAB
Rubber bumper
3
4072
HLAB
Mfr.
Code
09182
58474
79307
70903
28520
09182
09182
71785
09182
87575
09182
75915
09182
05820
09182
89032
08530
09182
09182
09182
09182
09182
09182
09182
09182
09182
09182
09182
09182
Stock No.
1510-0040
1510-0039
1400-0330
8120-0050
0400-0013
0370-0084
0370-0137
0360-1143
0360-1234
0403-0086
4040-0295
1400-0084
1120-1226
1205-0033
1460-0720
0510-0275
0340-0174
0340-0166
0340-0168
5000-6070
5000-6071
5000-6057
5000-6058
5000-6060
5000-6062
5000-6069
5000-6061
5020-5540
0403-0086
OPTION 06:
Overvoltage "Crowbar"
Protector Model 6916A
09182
Model 6916A
1
HLAB
6-7
RS
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
1
1
APPENDIX A
Option 11, Overvoltage Protection "Crowbar"
DESCRIPTION:
This option is installed in DC Power Supplies, 6101A, 6102A, 6106A, 6111A, 6112A, 6113A, and 6116A,
and tested at the factory. It consists of a printed circuit board, screwdriver type front panel potentiometer,
and four wires that are soldered to the main power supply board.
The crowbar monitors the output voltage of the power supply and fires an SCR that shorts the output when it
exceeds the preset trip voltage. The trip voltage is determined by the setting of the CROWBAR ADJUST
control on the front panel. The trip voltage range is as follows:
Model
61.01A
6102A
6106A
6111A
6112A
6113A
6116A
Trip Voltage Range
3.2-23V
3.2-44V
20-110V
3.2-23V
3.2-44V
3.2-13V
20-110V
To prevent transients from falsely tripping the crowbar, the trip voltage must be set higher than the power supply
output voltage by the following margin: 7% of the output voltage +1V. The margin represents the minimum crowbar
trip setting for a given output voltage; the trip voltage can always be set higher than this margin.
OPERATION:
1. Turn the CROWBAR ADJUST fully clockwise to set the trip voltage to maximum.
2. Set the power supply VOLTAGE control for the desired crowbar trip voltage. To prevent false crowbar
tripping, the trip voltage should exceed the desired output voltage by 7% of the output voltage +1V.
3.
Slowly turn the CROWBAR ADJUST counterclockwise until the crowbar trips, and the output fails to a
small positive voltage (about 1.8V or less).
4.
The crowbar will remain activated and the output shorted until the supply is turned off. To reset the
crowbar, turn the supply off, then on.
A-1
Table A-1. Replaceable Parts
REF.
DESIG.
TQ MRF. PART NO.
MFR
CODE
HP
PART NO.
RS
C1
C2
fxd, elect lµF 50Vdc
fxd, mica 510µF 500Vdc
1
1
30D105G050BA2 56289
RCM15E511J
04062
0180-0108
0140-0047
1
1
CR1-3
CR4
Diode, Si. 200mA 200prv
SCR 7.4A 100prv
3
1
C20A
02182
03508
1901-0033
1884-0031
Ql,2
SS NPN Si.
2
2N3417
03508
1854-0087
R1
R2
R3
R4
R5
R6
R7
R8
fxd, met. film 10Ω ±1%⅛W
fxd, comp 1.31KΩ ±5% 1W
fxd, met. film 1.21KΩ ±1% ⅛W
fxd, met. film 7.5KΩ ±1% ⅛W
var. ww 10KΩ ±5% (CROWBAR ADJ.)
fxd, ww 1KΩ ±5% 3W
fxd, comp 22Ω ±5% ½W
fxd, met, film 510Ω ±1% ¼W
1
1
1
1
1
1
1
1
Type CEA T-O
GB-1325
Type CEA T-O
Type CEA T-O
07716
01121
07716
07716
09182
56289
01121
07716
0757-0346
0689-1325
0757-0274
0757-0440
2100-1854
0913-0001
0686-2205
0698-5145
T1
Transformer, Pulse
1
09182
5080-7122
3
1
2
1
1
1
1
1
1
1
1
1
1
1
VR1
VR2
Diode, zener 6.19V±5%
Diode, zener 2.37V±5%
1
1
09182
09182
1902-0049
1902-3002
1
1
1
1
1
1
09182
09182
09182
79307
09182
09182
5000-6229
0340-0462
2190-0709
1400-0330
1410-0052
2950-0034
1
09182
7124-0369
1
09182
06101-60003
1
09182
06101-60021
242E1025
EB-2205
Type CEB T-O
MISCELLANEOUS
Heat Sink, CR4
Insulator, CR4
Mica Washer, CR4
Cable Clamp
Bushing, Potentiometer (R5)
Nut, Hex (R5)
Label, Information,
(CROWBAR ADJUST)
Modified Front Panel,
Includes Components
Printed Circuit Board Assembly,
Includes Components
A-2
T4-4
DC POWER SUPPLY
FROM INBOARD
SIDE OF R50
BIAS VOLTAGE FROM
COLLECTOR OF Q11
R5
10K
R2
1.3K
±5%
2W
CROWBAR
ADJUST
R4
7.5K
±1%
1/8W
+OUT
CR1
R6
1K
3W
Q2
VR1
6.2V
3
2
6
4
1
5
CR3
C1
1µF
50V
R3
1.21K
±1%
1/8W
R8
510
±1%
1/4W
CR2
Q1
C2
510µF
50V
R1
10Ω
±1%
1/8W
VR2
2.4V
-OUT
CIRCUIT PATENTS APPLIED FOR LICENSE TO USE
MUST BE OBTAINED IN WRITING FROM HEWLETTPACKARD CO. HARRISON DIVISION
Figure A-1. Model 6101A and 6111A Overvoltage Protection Crowbar
A-3
R7
22Ω
±5%
1/2W
CR4
T1
9100-2127
16
28
32
CR24
6
+12.4V
Q12
7
A3
C25
.02µF
42
VAC
8
CR20
R52
2.4K
CR25
Q13
R45
10K
R45
1.5K
R47
1.5k
⅛W
R49
714
¼W
29
30
33
C14
20µF
50V
C13
.033µF
200V
50V
Q14
R48
1.5K
⅛W
ACC
R53
2.7K
AC
R13
1MEG
¼W
35
R44
4.3K
A2
R15 1MEG ¼W
R16
15K
23
17
R12
17.8K
¼W
Q15
VR1
R46
2.7K
R11
22K
R14
15K
43
C16
325µF
35V
VOLTAGE
FINE
R10
390K
⅛W
R24
7.5K
R26
10K
+S
44
REFERENCE
REGULATOR
CIRCUIT
CR19
CURRENT
LIMIT
CIRCUIT
A1
34
VR2
-9.4
20
4
BIAS
S1
42
45
CR27
11
CR28
10
33VAC
49
3
47
F1
1A
R61
2K
53
C17
1450µF
45V
L1
26
CR31
R55
33K
A10
A9
20V
C21
.033µF
200V
39
R36
2K
R64
1.21K ⅛W
CR9
L2
R39
300
2W
11
CR13
2.5V
12
R38
1.5K
CR29
36
R35
680
C8
.001µF
200V
C7
.068µF
200V
C19
1500µF
40V
25V
R54
600Ω
5W
DRIVER AND
ERROR AMPLIFIER
R4
27.4K
⅛W
C2
.1µF
200V
12
Q2
Q9
27
38
C3
.033µF
200V
25
CR30A
SERIES
REGULATOR
1
R21
2K ⅛W
4
2
3
A8
A7
+F
A1'
+OUT
CURRENT SAMPLING RESISTOR
+S
R32
10k
24
CR16
15
3
METER
CIRCUIT
R33
1K
C6
.001µF
200V
14
4
2
R23
1Ω 8W
.24Ω
R37
10
3
R68
560
R34
390
Q10
C15
.02µF 600V
R69
19.1K
⅛W
R42
42.2 ⅛W
41
2
R41
200
CR10
35VAC
1
R50
Q11
R67
1K
A5
64Ω ±10%
A3
R65
10Ω
15
37
R66
select+
R22
THERMISTOR
A11
-2.5V
R17+ ¼W
297*
M
40
CR23
51
C18A
.02µF 600V
CIRCUIT PATENTS APPLIED FOR
LICENSE TO USE MUST BE OBTAINED
IN WRITING FROM HEWLETT PACKARD
HARRISON DIVISION
R29
100
+6.2
1
R51
52
R62
220
R60
1K
1
13
C5
.22µF
80V
CR4
C10
20µF
50V
2
R25
1K
CURRENT
LIMIT
CR26
48
50
OVEN
CONTROL
CIRCUIT
R56
select+
Q16
41
21
R59
680
9
2
R27
1K
18
C20
.0022µF
200V
HEATER
46
CR8
31
22
R28
1K
Q5
54
R9
120
Q8
Q7
R31
3.9K
R3
221K
⅛W
R2
1K
3W
14
R7
43K
⅛W
Q1B
Q1A
13
R8
43K
⅛W
CR1
CR2
19
Q3
R40
100Ω
5W
S2 POSITIONS
1 – 2.4V
2 – 24v
3 – 1.2A
4 – .12A
C1
1µF
35V
A4
R1
1K, 3W
A5
C6
.001µF
200V
VOLTAGE
INPUT
CIRCUIT
R18
5.9K±1%
0±5ppm/°C
R19
5.5K±1%
+15±5ppm/°C
R5
432K
⅛W
R6
432K
⅛W
A6
R63
.51
CR32
R30
5.1K
C24
1µF
200V
C23
VOLTAGE
COARSE
1450µF
45V
C4
1µF
200V
R20
10K
A8
-S
NOTES:
1. ALL RESISTORS ARE ½W, 5% UNLESS OTHERWISE NOTED.
2. ALL ⅛W AND ¼W RESISTORS ARE 1% INTOLERANCE.
3. + DENOTES NOMINAL VALUE, COMPONENTS SELECTED FOR OPTIMAL PERFORMANCE.
4. * DENOTES 20PPM WIRE TEMPERATURE COEFFICIENT.
5. REAR TERMINALS ARE SHOWN IN NORMAL STRAPPING.
6.
DENOTES VOLTAGE FEEDBACK SIGNAL.
7.
DENOTES CURRENT FEEDBACK SIGNAL.
8. TRANSFORMER SHOWN STRAPPED FOR 115VAC OPERATION. SEE
INSTRUCTION MANUAL FOR 220VAC.
-F
9. DC VOLTAGES WERE MEASURED UNDER THE FOLLOWING CONDITIONS:
A. SIMPSON MODEL 260 OR EQUIVALENT.
B. 115VAC INPUT.
C. VOLTAGES REFERRED TO +S UNLESS OTHERWISE NOTED.
D. VOLTAGES ARE TYPICAL, ±10% UNLESS OTHERWISE NOTED.
E. SUPPLY IN CONSTANT VOLTAGE OPERATION AT MAXIMUM RATED OUTPUT WITH NO LOAD
CONNECTED. CURRENT CONTROLS SHOULD BE TURNED FULLY CLOCKWISE
-OUT
Model 6101A, Schematic Diagram
MANUAL CHANGES
Model 6101A DC Power Supply
Manual HP Part Number 06101-00001
Make all corrections in the manual according to errata below, then check the following table for your power supply
serial number and enter any listed change(s) in the manual.
SERIAL
MAKE
CHANGES
CHANGE 2:
Prefix
Number
In the replaceable parts table, and on the schematic
diagram, make the following changes:
All
–
Errata
CR13: Change from one triple function diode to three
0101-0600
6L
1
series diodes, CR5, CR6, and CR7, 1N5059, HP Part
0601-0646
6L
1,2
No. 1901-0327.
0646-0665
1A
1,2,3
0666-0745
1E
1,2,3,4
CHANGE 3:
0746-0805
1137A
1 trhu 5
In
the
replaceable
parts
table, make the following change:
0806-0910
1137A
1 trhu 6
R51: Add new resistor, 20Ω ±5%, ½W, HP Part No.
0911-1275
1137A
1 trhu 8
0686-2005.
1276-up
1629A
1 trhu 9
On the schematic at the rear of the manual, add R51 in
series with capacitor C4, on the -S side of C4.
On the title page, change the serial number prefix from 6L
to 1A.
ERRATA:
In the replaceable parts table, change Q7, 8 to
2N2907A. Sprague, 56289, 1853-0099.
CHANGE 1:
In the replaceable parts table, make the following changes:
C15: Delete C15.
C18A: Delete C18A.
CR30A: Delete CR30A.
CR29, CR30B, CR33, CR34: Add new rectifier diodes,
1A, 200prv, 1N5059, G.E., HP Part No. 1901-0327.
Q2, Q3: Change to HP Part No. 1864-0071, SS NPN Si.
R20: Change from 10kΩ to 20kΩ ±5%, 2W (10 turn) HP
Part No. 2100-1867.
On the schematic at the rear of the manual, and on Figure
4-2, change the main supply rectifier to bridge type as
shown below.
37
T1 12
CR33
CR29
13
C18B
.02
600V
35VAC
CR34
15
CR30B
CHANGE 4:
In the replaceable parts table, make the following changes:
S1: Change to new type pushbutton switch, HP Part
No.3101-1248.
T1: Change Power transformer to HP Part No. 5080-7181.
CHANGE 5:
The serial prefix of this unit has been changed to 1137A.
This is the only change.
CHANGE 6:
The standard colors for this instrument are now mint gray
(for front and rear panels) and olive gray (for all top,
bottom, side, and other external surfaces). Option X95
designates use of the former color scheme of light gray and
blue gray. Option A85 designates use of a light gray front
panel with olive gray used for all other external surfaces.
New part numbers are shown on back.
CHANGE 7:
In the replaceable parts table and on the schematic, make
the following changes:
R13: Change to 562kΩ, ⅛W, HP Part No. 0757-0483.
R24: Change to 5.1kΩ, ±5%, ½W, HP Part No. 06865125.
R58: Add R58, var. ww, 5kΩ, ±5%, HP Part No. 21000741.
R58 is added as follows:
C19
1500
40V
To 9.4V REF.
R58
38
R24
To R28
R25
The above changes have been made to allow for Option
040 (multiprogrammer remote programming) operation; to
allow the current limit to be set to 110 ±2% of rated
current.
Manual Changes/Model 6101A
Manual HP Part No. 06101-90001
Page — 2 —
DESCRIPTION
Panel Front, Lettered
Side Chassis, Left
Side Chassis, Right
Cover
Heat Sink
STANDARD
06101-00004
5060-7955
5060-7956
5000-9424
5060-7966
HP PART NO
OPTION A85
06101-60001
ERRATA:
In Table 1-1 and paragraph 5-23, change the OUTPUT
IMPEDANCE specification to read:
OUTPUT IMPEDANCE (Typical): Approximated by a
0.5 milliohm resistance in series with a 1 microhenry
Inductance.
 Add to the parts list the replacement lamp for illuminated
switch 3101-1248, which is used in those supplies that
include Change 4. The HP Part No. of the type A1H lamp
is 2140-0244.
CHANGE 8:
In Appendix A, Option 11 replacement parts table A1,
change CR4 from HP Part No. 1884-0031 to 1884-0032.
CHANGE 9:
This change reduces the magnetic radiation induced in the
oven control circuit to ensure a ripple specification of
100µV peak-to-peak.
In the replaceable parts table and on the schematic, make
the following changes:
R60: Delete.
R62: Change to 1k, 5%, ½W, HP Part No. 0686-1025.
CR23: change to HP Part No 1901-0033 and connect in
shunt with L2 as shown below.
On the schematic, change the oven control circuit as shown
below:
2
Q16
CR31
1
R62
1k
CR23
L2
ERRATA:
The front panel binding posts have been changed to a type
with better designed insulation. Delete the two types of
posts listed on page 6-7 of the parts list end add: black
binding post, HP Part No. 1510-0114 (qty. 2); and red
binding post, HP Part No.1810-0115 (qty. 1).
OPTION X95
5060-6119
5060-6118
5000-6061
5060-6124
ERRATA:
The Lime-gray meter bezel has been replaced by a black
one, HP Part No. 4040-0414.
 Change the part number of R58 (added to the current
limit circuit by Change 7) to 2100-1775. The resistor has
not been changed; just its part number has.
11-29-76